It's been more than a year and I don't hear any response, so might as well bump this one and share my findings.

So in one of our project, we recently updating to LuaSocket 3.1.0, so I took the opportunity to enable Unix sockets in Windows. It seems enabling this support is a matter of changing the included file. In Windows, #include <afunix.h> is used instead of #include <sys/un.h>. love2d/love@857cf40.

Quick test of the Unix stream socket and it behaves as expected. Unfortunately Unix datagram is not supported.

Unix sockets in Windows has been supported since Windows 10 1809. Would there be an plan to enable unix sockets in Windows?

We'd be happy to facilitate any PRs contributing to a better experience on the Windows side of things. Neither I nor any other current maintainer actively uses Windows though so researching, coding, and testing for this will need to come from community contributions. When you first posted this there wasn't an active maintainer, but I think we've made some progress on that front and there should be a path for improvements to integrated and released if they are contributed and tested.