Administrators are people assigned the highest level of control over the site. These people can control all facets of operation, which includes setting permissions, banning users, creating usergroups or moderators, etc. They also have full moderator capabilities in all the forums.

Moderators are individuals (or groups of individuals) whose job it is to look after the running of the forums and monitoring the galleries from day to day. They have the power to edit or delete posts and lock, unlock, move, delete and split topics in the forum they moderate. And they have the ability to recategorize or delete gallery images. Generally moderators are there to prevent people going off-topic or posting abusive or offensive material.

Usergroups are a way in which board administrators can group users. Each user can belong to several groups (this differs from most other boards) and each group can be assigned individual access rights. This makes it easy for administrators to set up several users as moderators of a forum, or to give them access to a private forum, etc.

To join a usergroup, click the usergroup link on the forum header. You can then view all usergroups. Not all groups are open access, some are closed and some may even have hidden memberships. If the group is open, then you can request to join it by clicking the appropriate button. The user group moderator will need to approve your request and they may ask why you want to join the group. Please do not pester a group moderator if they turn your request down.

Usergroups are initially created by the board admin, they also assign a board moderator. If you are interested in creating a usergroup then your first point of contact should be the admin, try dropping them a private message.