FuseTalk refers to pre-defined types of users.  They are Forum Owner, Moderator, and User.

Forum Owners are individuals who have been assigned to manage a forum.  Forum owners have the rights to change any forum level, create discussion categories for their forum, create moderators, and manage their own sets of users.

Moderators are individuals who have been assigned to moderate a category within a forum.  A moderator can be assigned to one or multiple categories and their permissions range from deleting messages/topics to banning individuals from accessing the forum.

Users are individuals or members who have been given access to a forum or who have publicly registered to access the forum.  These members do not have any special privileges unless otherwise given by the Forum Owner.  Users can become Moderators or Forum Owners if designated by the Forum Owner.