I haven’t tried, but I’m pretty sure you can just launch it under mono on linux natively, without wine.
*The easiest way to describe what Mono currently supports is:
Everything in .NET 4.5 except WPF, WWF, and with limited WCF and limited ASP.NET 4.5 async stack.
Compatibility | Mono
So just install mono and do mono mmochatserver.exe *in console and it doesn’t matter that it’s a windows file extension, it just contains CIL instructions.