smtpd_recipient_restrictions and relay_recipient_maps

Is there a way to specify a restriction based on relay_recipient_maps in
smtpd_recipient_restrictions? reject_unverified_recipient will not work
with our internal mail server (GroupWise 5.5), as it accepts any
recipient.

Ideally, I'd like to have something like this:

smtpd_recipient_restrictions =
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
permit_mynetworks,
reject_unauth_destination,
check_recipient_access hash:/etc/postfix/postmaster,
# New option?
check_relay_recipient hash:/etc/postfix/relay_recipients,
check_sender_access hash:/etc/postfix/disallow_my_domain,
check_sender_access hash:/etc/postfix/banned_senders,
check_sender_access hash:/etc/postfix/oft_forged_senders,
permit

This would allow me to check my relay_recipient_maps (relay_recipients)
file prior to the check_sender_access of the oft_forged_senders file
which I use to reject_unverified_senders. Right now, it seems that the
check of the relay_recipient_maps file happens after the incoming email
is 'permitted'.

I hope this makes sense.

Thanks,

Ken