lets say I have a contact "John Miller" with the primary e-mail address
and secondary . I would
like to set up a rule which only applies to some of John Millers addresses,
but not to others, i.e. if I receive an e-mail addressed to jmiller I
would like to forward it or move it to another folder or delete it, but
that
shouldn't apply to mails sends to john.miller.

Try putting (or whichever) for the address.
I think that *should* work.

--
-f.h.