[Mediawiki-l] Limit editing to original author

[Erin Spiceland]

Hi! I tried searching the archives for this, but the description of my
problem has such general terms that I got literally thousands of hits,
and couldn't hope to search for them all.  As such, I apologize if this
question has been addressed before!

I am looking for a mod or plugin that would allow only the original
author of an article to edit said article.  If this hasn't been done or
isn't possible, then I'd be interested in a way to lock all articles
upon the initial submission.

Do any of you know of such a functionality, either which already exists
in mediawiki, or which exists in the form of a mod or plugin?

Thanks!

Erin