how to stop certain users from receiving mail from various domains?

Hi all,

I've configured a mail server running Postfix and it's able to do the
following:

- allow users listed in restricted_senders (below) to email domains listed
in local_domains (below)
- those not listed below can email anyone and receive emails from everyone

local_domains
-------------
domain1.com OK
domain2.com OK


restricted_senders
------------------

user1@mydomain.com local_only
user2@mydomain.com local_only


main.cf
-------
smtpd_recipient_restriction = check_sender_access
hash:/etc/postfix/restricted_senders, permit_mynetworks,
check_relay_domains, check_recipient_access maptype:mapname,
reject_non_fqdn_recipient, reject_unknown_recipient_domain

smtpd_restriction_classes = local_only

local_only = check_recipient_access hash:/etc/postfix/local_domains, reject

I'd like to be able to restrict the users listed in restricted_senders from
receiving emails from everyone. I'd like them to be able to only receive
emails from domains listed in local_domains. I tried adding
"check_recipient_access hash:/etc/postfix/restricted_senders" to
smtpd_recipient_restriction but it doesn't work. Does anyone know how to do
this?

Thanks in advance
Eric