Local users password policy different from complex domain password policy?

I have Default domain GPO that says that all the password should be complex, I know that I can’t set different password GPO for OU because of Windows Server 2003 = one domain, one default password policy).

I have one computer with Windows Server 2003, member of my domain, and normally when i log on to it on the domain it has the password complexity from the default domain GPO but, my question is:

How to set when someone log on this computer locally (with some local user account, not from the domain), to log in with simple (not complex) password, because even log in locally the local accounts take the complexity for the passwords from default domain GPO???