tmda-cgi + vmailmgr + qmail relay

hi all

i currently have a number of virtual domains setup, some with
tmda/tmda-cgi, some without.

the virtual domain with tmda/tmda-cgi should not hold the mailboxes,
it should pass the mail to our internal mail server for local mail
delivery.

this is what i am attempting to do.

i want to setup a virtual domain where any tmda/tmda-cgi "enabled"
user has the option of managing there pending queue, filters, lists
etc..

users that have not "enabled", or decline to "enable" tmda via
tmda-cgi will not have there email touched my tmda and as such, the
messages will be automatically forwarded to the internal domino server
for processing.

does it sound possible ?