Access db multiple conditions ?.

Hi,

Our sendmail server is handling incoming mails for several domains (cw
file).

Now I want sendmail to accept receiving Email for 1 domain from only 1 IP
source (antispam
filter), and keep on accepting Email for the other domains from Internet.

I can't figure out how to do that with access db file..
Is there another way ?.

Thank for any hints.
PM.