[Mediawiki-l] User rights management limited to users you create?

[Jim Hu]

My wiki requires login to edit, but allows any registered user to  
create accounts.  I'd like to create another user group "student",  
which can edit but can't create accounts.

Based on

	http://www.mediawiki.org/wiki/Help:User_rights

I think creating the group and assigning the rights is  
straightforward.  But I also want the users with create account  
rights to be able to create either regular or student accounts.   
Ideally, I would want users to have user rights management only on  
accounts that they create, and be able to use the regular user rights  
Special Page where regular users would only see "student" as an  
addable group, and only for those that were created by them.

I'm guessing that I will have to write an extension... but does  
anything like this already exist?  It would be useful in teaching  
environments, I think.

Jim
=====================================
Jim Hu
Associate Professor
Dept. of Biochemistry and Biophysics
2128 TAMU
Texas A&M Univ.
College Station, TX 77843-2128
979-862-4054