First off, there is no such thing as an approved edit - someone edits something, and it's there. The only way to protect segments is to lock them - only editors of your edit rank or higher can edit them then.
If you want to talk with the user who last edited an area, the best option is to try to PM them here in the forums.
If you don't want to talk with the last editor, or don't get a response, you can post a Permalink
here in the forums and senior editors (and others) can look at the area.
I'm also going to send you a PM.