any mod out there or feature that I missed that allows sometone to search ipaddreses that a user has used and which handles have used that ip address? I know vbulletin has something like that and it would be a great feature!
There isn't currently a mod to do this, but there will be shortly.
After the release of MyBB Gold I'll be releasing an Expansion Module system which was originally developed by Laslo. It'll allow you to add various new features to your ACP, and one of the new modules I would like to develop is something like what you've requested.