diff --git a/src/components/com_cluster/administrator/models/clusters.php b/src/components/com_cluster/administrator/models/clusters.php
index 25ac53d..803e2af 100644
--- a/src/components/com_cluster/administrator/models/clusters.php
+++ b/src/components/com_cluster/administrator/models/clusters.php
@@ -58,7 +58,7 @@ protected function getListQuery()
 		$query = $db->getQuery(true);
 
 		// Create the base select statement.
-		$query->select(array('cl.*','users.name as uname'));
+		$query->select(array('cl.*','users.name as uname','cl.id as cluster_id'));
 		$query->from($db->quoteName('#__tj_clusters', 'cl'));
 		$query->join('LEFT', $db->quoteName('#__users', 'users') . ' ON (' . $db->quoteName('cl.created_by') . ' = ' . $db->quoteName('users.id') . ')');
 
diff --git a/src/components/com_cluster/administrator/models/clusteruser.php b/src/components/com_cluster/administrator/models/clusteruser.php
index 3357797..15b46de 100644
--- a/src/components/com_cluster/administrator/models/clusteruser.php
+++ b/src/components/com_cluster/administrator/models/clusteruser.php
@@ -131,11 +131,13 @@ public function getUsersClusters($userId = null)
 		JLoader::import("/components/com_cluster/includes/cluster", JPATH_ADMINISTRATOR);
 
 		// If user is not allowed to view all the clusters then return the clusters in which user is a part else return al cluster
-		if (!$user->authorise('core.manageall.cluster', 'com_cluster'))
+		if (!$user->authorise('core.manageall', 'com_cluster'))
 		{
 			$clusterUsersModel = ClusterFactory::model('ClusterUsers', array('ignore_request' => true));
 			$clusterUsersModel->setState('list.group_by_client_id', 1);
 			$clusterUsersModel->setState('filter.published', 1);
+			$clusterUsersModel->setState('list.ordering', 'cl.name');
+			$clusterUsersModel->setState('list.direction', 'ASC');
 			$clusterUsersModel->setState('filter.user_id', $user->id);
 
 			// Get all assigned cluster entries
@@ -147,6 +149,8 @@ public function getUsersClusters($userId = null)
 
 			// Get all cluster entries
 			$clusterModel->setState('filter.state', 1);
+			$clusterModel->setState('list.ordering', 'cl.name');
+			$clusterModel->setState('list.direction', 'ASC');
 			$clusters = $clusterModel->getItems();
 		}
 
@@ -162,12 +166,12 @@ public function getUsersClusters($userId = null)
 
 		if (!empty($clusters))
 		{
-			if ($subUserExist && (!$user->authorise('core.manageall.cluster', 'com_cluster')))
+			if ($subUserExist && (!$user->authorise('core.manageall', 'com_cluster')))
 			{
 				foreach ($clusters as $cluster)
 				{
 					// Check user has permission for mentioned cluster
-					if (RBACL::authorise($user->id, 'com_cluster', 'core.manage.cluster', $cluster->id))
+					if (RBACL::authorise($user->id, 'com_cluster', 'core.manage', $cluster->cluster_id))
 					{
 						$usersClusters[] = $cluster;
 					}
diff --git a/src/components/com_cluster/administrator/models/clusterusers.php b/src/components/com_cluster/administrator/models/clusterusers.php
index 1e5ebfa..c4de463 100644
--- a/src/components/com_cluster/administrator/models/clusterusers.php
+++ b/src/components/com_cluster/administrator/models/clusterusers.php
@@ -62,24 +62,6 @@ protected function getListQuery()
 		. $db->quoteName('users.id') . ')');
 		$query->join('INNER', $db->quoteName('#__tj_clusters', 'cl') . ' ON (' . $db->quoteName('cl.id') . ' = ' . $db->quoteName('cu.cluster_id') . ')');
 
-		// Get com_subusers component status
-		$subUserExist = ComponentHelper::getComponent('com_subusers', true)->enabled;
-
-		if ($subUserExist)
-		{
-			$roleId = $this->getState('filter.role_id');
-
-			if (is_numeric($roleId))
-			{
-				$query->join('INNER', $db->qn('#__tjsu_users', 'su') .
-			' ON (' . $db->qn('users.id') . ' = ' . $db->qn('su.user_id') . ' AND ' . $db->qn('su.client') . ' = "com_multiagency" )');
-				$query->join('INNER', $db->qn('#__tjsu_roles', 'r') .
-			' ON (' . $db->qn('r.id') . ' = ' . $db->qn('su.role_id') . ' AND ' . $db->qn('r.state') . ' = 1 )');
-
-				$query->where($db->quoteName('su.role_id') . ' != ' . (int) $roleId);
-			}
-		}
-
 		// Filter by search in title.
 		$search = $this->getState('filter.search');
 
diff --git a/src/components/com_cluster/site/controllers/clusterusers.json.php b/src/components/com_cluster/site/controllers/clusterusers.json.php
new file mode 100644
index 0000000..2753758
--- /dev/null
+++ b/src/components/com_cluster/site/controllers/clusterusers.json.php
@@ -0,0 +1,73 @@
+<?php
+/**
+ * @package    Com_Cluster
+ * @author     Techjoomla <extensions@techjoomla.com>
+ * @copyright  Copyright (C) 2009 - 2019 Techjoomla. All rights reserved.
+ * @license    GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+// No direct access
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Response\JsonResponse;
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\CMS\Session\Session;
+
+JLoader::import("/components/com_cluster/includes/cluster", JPATH_ADMINISTRATOR);
+
+/**
+ * Get Cluster Users controller class.
+ *
+ * @since  1.0.0
+ */
+class ClusterControllerClusterUsers extends BaseController
+{
+	/**
+	 * Method to get user list depending on the client chosen.
+	 *
+	 * @return   null
+	 *
+	 * @since    1.0.0
+	 */
+	public function getUsersByClientId()
+	{
+		$app = Factory::getApplication();
+
+		// Check for request forgeries.
+		if (!Session::checkToken())
+		{
+			echo new JsonResponse(null, Text::_('JINVALID_TOKEN'), true);
+			$app->close();
+		}
+
+		$clusterIds = $app->input->getInt('cluster_id', 0);
+		$userOptions = $allUsers = array();
+
+		// Initialize array to store dropdown options
+		$userOptions[] = HTMLHelper::_('select.option', "", Text::_('COM_CLUSTER_OWNERSHIP_USER'));
+
+		// Check cluster selected or not
+		if ($clusterIds)
+		{
+			$clusterObj = ClusterFactory::model('ClusterUsers', array('ignore_request' => true));
+			$clusterObj->setState('filter.block', 0);
+			$clusterObj->setState('filter.cluster_id', $clusterIds);
+			$clusterObj->setState('list.group_by_user_id', 1);
+			$allUsers = $clusterObj->getItems();
+		}
+
+		if (!empty($allUsers))
+		{
+			foreach ($allUsers as $user)
+			{
+				$userOptions[] = HTMLHelper::_('select.option', $user->user_id, trim($user->uname . ' (' . $user->uemail . ')'));
+			}
+		}
+
+		echo new JsonResponse($userOptions);
+		$app->close();
+	}
+}