Thread:Project:Support desk/User / Moderator Edit Rights/reply

This can be done and I guess even without any special extensions.

All this can be done in LocalSettings.php with writing some lines of PHP code.

You need to define user groups in $wgUserGroups. For each group you must set group rights in $wgGroupPermissions.

A good start is looking at Manual:User_rights; it's not to hard. ;-)