Many multi-player games allow you to run public or private servers on your own. Are questions about the administration of these servers applicable for this site?
Examples would be something like - "How do I adjust the map rotation on my TF2 server?", or, "Where can I find a good source for plug-ins on my XXX server?"
Edit: Given this question and answer, it would suggest that topics like this are still on topic - but it's not 100% clear.