Login Domain Restriction

Good Afternoon Everyone,
I’m seeking advice on restricting user login domain through AD GPO. Currently there’re two domains in our production environment (ex. domainA & domainB, full trust between them).
I would like users from domainA to login and authenticate through domainA only, samething for domainB users. Is there a way to implement this policy through AD GPO?
Please advise.
Thx,
Melvin
mchao@lacsd.org
chaom@earthlink.net