canonical maps

[R. Berger]

hi,

I have the following problem coming from sendmail:
This is how it is set up in virtusertable:
@domain.nl   %1...@otherdomain.nl
us...@domain.nl  localuser1
us...@domain.nl       localuser2
us...@domain.nl     localuser3
I am using postfixadmin and the local users are working.
But how do I forward all the other mail? I understand I can do that for 
a complete domain using canonical_maps option but does it work together 
with local virtual users?

Thanks,
Roger