This is just a "this would be cool" thing I ran into tonight.  I have a
filter set up to direct all mail from my housemates into a separate folder.
 Well, one of them changed his email address, so his mail got routed into
the regular Inbox.  I had to go into the filter and change his email address.

Just thought it might be a cool feature to be able to filter on Contact
name, so that I could just filter on the contact "Torg" and any email
addresses for that contact would be in effect for the filter.

Like I said, just a thought, so feel free to close if you don't agree.

Thanks, Troy