Forum:Add user group?

Is it possible for me to add another user group in a wiki using Special:Contact? e.g. The RuneScape Wiki has a "Forum Admin" group. -- .. Jeff  (Talk!)   (Contribs!)   (Email!)   (Blog!) .. 03:24, September 18, 2010 (UTC)


 * Whether or not a group is added all depends on what you're asking for but, yes, you can ask via Special:Contact for that. - Brandon Rhea (talk) 03:58, September 18, 2010 (UTC)


 * The Forum Admin can moderate the phpBB Forums. —Manyman (talk) 06:04, September 18, 2010 (UTC)


 * Oh. Well, how in the universe did the RuneScape Wiki persuade Wikia to host phpBB Forums? Doesn't Wikia have their own forum system, the one we're using right now? (Sounds weird to me) -- .. Jeff   (Talk!)   (Contribs!)   (Email!)   (Blog!) ..  11:59, September 18, 2010 (UTC)
 * They are different types of forums for different types of uses. 13:02, September 18, 2010 (UTC)


 * Is it possible to make a new user group that can rollback, block users, and delete pages? (no big delete) -- .. Jeff   (Talk!)   (Contribs!)   (Email!)   (Blog!) ..  13:18, September 18, 2010 (UTC)