Like the forum, there are several user groups for the wiki, each with their own rights.
Can only read. It is now possible to create an account.
Can edit and create articles.
Can move pages and edit semi-protected pages. All users who have at least 10 edits and have registered for at least for a week are autoconfirmed.
They both have the ability to block, delete and perform a variety of other administrative stuff. Administrators are also able to access a few uncommon permissions not available to moderators, while only moderators can assign the bot flags to themselves and add the mover right to anyone.
A user group available only to Andy and mrpijey, this is the highest level and allows them to assign and revoke any permission to any user and create new usergroups.