A moderator is one who watches over the forums and enforces forum guidelines. If necessary, moderators/administrators close or delete threads, delete posts, ban members for aggregious violations of forum rules, etc.
Um...we're basically the most hated persons on the forums...or some of us are at any rate.
A piece of advice: Stay away from "net speak abbreviations" like "u", "ur" and things like that. Believe it or not, there's a rule about not abusing the English language.
A second piece of advice: Don't turn away -any- answer given to your rather vague question. I think that Starsky-sama was only trying to help. If you go to the forum index all the way at the bottom, just above the list of online members, there's a link to "forum leaders". That will give you the names you wish.