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

I need following Heirarchy in my wiki system.

reader- read only, visitor

user / contributor - only submit with photogrpah, but NO PUBLISH

moderator--- only submit with NO PHOTOGRAPH but Publish only artcile.

bureaucrats-- EDIT with PHOTOGRAPH ( after that Rtn historian becomes member of RGHF )

"NINJAS" --- (Proposed) : Structure, re-structure and Maintain interweaving links

SYSADMINs / SYSCOPs -- *AND* all of the above

how to go about. Which extension should (if) i use?

please guide me step by side.

Regards,