Does ue4 create new threads for each peer connection? Or everything is using 1 thread?
I’m not doing anything networked right now so I can’t check, myself, but what you can do is run a network-enable project (I’m not sure if they bother with anything of this nature at all, but if they do, I’m also not sure if it happens always or only if you actually set up things to replicate) and put a breakpoint in Visual Studio. Once it’s hit, from top-most toolbar, selected ‘Debug -> Windows -> Threads’ to see all threads currently created/used by the project, as well as where each of them are at in the code at the time of the breakpoint.
As for your actual question, I have no idea. Hope the above helps you research a little more though 