CrackBerry Genius of Geniuses
This is what the Help Page says:
"To field contains:
Specify an email address that the email message filter should search for in the To field of email messages. The address can be your email address or another email address. If the email address belongs to a mailing list, the email message filter will not block email messages from the mailing list unless you create another email message filter for the email address of that mailing list.
If that doesn't work, then you will likely need to set up a bunch of filters and use the "From" setting.