multi domain problem, fetchmail?!

[Seyyed Hamid Reza Hashemi Golpayegani]

hi all;
we have several domains hosted on our machine, we
want to store all of the emails for one of our domains
into someone's mailbox.
for example:
we have boshra.net and sgc-iran.com, we want to deliver
any email on this domain (for example [EMAIL PROTECTED],
[EMAIL PROTECTED], .... and in general [EMAIL PROTECTED])
to one e-mail address on boshra.net that is: 
[EMAIL PROTECTED]
how can we do that?

ps. we can store all the e-mails [to all the domains which
are on our machine] by .qmail-default into [EMAIL PROTECTED]
but how about exculding other domains? [only [EMAIL PROTECTED]
should be delivered to [EMAIL PROTECTED] not other domains]
we tried .qmail-sgc-iran.com-default but it didnt work.