Filtering Then Forwarding

[DOODS]

Hello All.
I need a quick help. I would like to do a filtering based on the from and
to headers and then forward emails to a specific email address if matched.
To be more detailed:

Condition: <From: user1 at domain1.com> and <To: *@domain2.com>
Action: Forward to user3 at domain3.com

We're running MailScanner and Exim with MySQL. I have been googling since
this morning and can't find the answer that I need. I hope someone can
help.
Thanks in advance.
Now it's back to googling for me...

Cheers,
DOODS