I've used both a tag query on "comments" and a search for "edit comments" for this and didn't find an appropriate thread; sorry if I wasn't looking hard enough. :-)
Someone at my blog posted a comment, then wanted to add more detail; however, not being registered, he couldn't edit his previous comment. I told him to register and thought that that would let him edit comments; just to go sure, I tried it out myself with a test account. To my surprise, a comment that I posted with that account was *not* editable from within that account, i.e. the "edit" link did not show up in my slightly altered Kubrick theme.
So I went to the User Levels page at the Codex ( http://codex.wordpress.org/User_Levels ) and checked; it seems ambiguous however as to which is the lowest User Level that allows "edit one's own comments". In addition, even level 1 already allows things like draft posts, which I'd rather not let anyone who registers do.
My 2 questions thus would be: which is the lowest user level that allows comments (and can I set WP to automatically move registrants to that level?), or is there a hack I can perform to just allow comment editing for User Level 0?