[fetchmail]blocking certain users

I have the following in my .fetchmailrc
which does the delivery for all the users


poll pop.inta.net proto pop3:
        envelope "X-Envelope-To"
        localdomains inta.net ml3.inta.net
        user "itr(_at_)inta(_dot_)net"
        with pass "nopass"
        is * here

this works fine.

but there are some users whose mails I want to discard/delete from 
fetchmail before delivering to sendmail local.
i dont mind it going to a certain dir also.

any ways for this.