The forum is run by a hierachy of usergroups.
Admin - The manager and webmaster of the forum. Has control over every aspect of the forum software, domain, hosting, and revenues.
Has final say on policy/moderation matters, pays all bills, installs hacks and upgrades, tweaks the configuration when necessary, is responsible for all emergency maintenance, and generally carries the can when all hell is breaking loose.
Senior Moderator - Voluntary position, has limited admin powers mostly related to user management, as well as regular moderation powers. Has final say in the case that Admin is not available to comment on moderation/policy issues. Has the authority to ban users if need be.
Moderator - Voluntary position, has the ability to close, delete, split, merge, edit, or otherwise take action on threads or posts deemed to be inappropriate. Moderators are selected by other moderators and admin based on any merits they have shown in the course of their posting as a registered user. If you have to ask to become one, you probably are not suitable. We never base moderator appointments on user polls or speculation.