Hi,
this is an interesting project. I could create a Perl script that would connect to Mailwizz'es database, query your crtiteria and have the appropriare records removed. run as a cron job in intervals.
So, the job would be automated, but no gui extension for you.
if do it gradually - first just list the ones to be deleted, and wheb we're sure it's picking the right ones, automatically delete them.
All the best,
Istvan