Zimbra LDAP + Samba multiple domains?

Hi I'm wondering if Zimbra LDAP and the zimlets required for managing a samba domain can handle multiple domains. Since Zimbra can handle multiple domains as a mail server, why wouldn't it be able to handle multiple domains for samba authentication? The real question is whether anyone knows how to configure it for multiple domains? I'm new to LDAP so be gentle. I'd say the following page is my only real source of info:

UNIX and Windows Accounts in Zimbra LDAP and Zimbra Admin UI

Thanks in advance!