Mail filters (linux server)

[Dolphin]

Is it possible to have two conditions in a mail filter? I know there isn't a direct way to do it, but could I do something with, say, AnyHeader Matches Regex, or by forwarding messages to a PHP script? It says you can forward to Perl, but I don't know Perl - and I haven't tried this sort of thing with PHP either.

I have two email addresses, both pointing to the same account. One of them is out on the internet, and obviously gets a lot of spam. The other is a personal address that gets virtually no spam, if any. I'd like to be able to delete all spam on the public address automatically, but accept it on the personal address to avoid losing any false positives. Even better would be if I could block any emails with a spam level over a particular number, so a message with a score of 5 would be delivered tagged as spam, but one over, say, 8, would be deleted.