Q4.0.2: How do I get VM to filter mail for me?

One possibility is to use procmail to split your mail before it gets to VM. I prefer this personally, since there are many strange and wonderful things one can do with procmail. Procmail may be found at ftp://ftp.informatik.rwth-aachen.de/pub/packages/procmail/.

Also see the Mail Filtering FAQ at: ftp://rtfm.mit.edu/pub/usenet/news.answers/mail/filtering-faq.