How do I set login for single host instead of domain?

I see. The "user confusion" bit is a little strange to me. If the default setting is to use the root domain and strict FQDN setting is something that would need to be turned on by more advanced users, how would anyone who doesn't use it get confused? I am not asking to change the default behavior of the tool. I just want the option when I need to use it.

This is a deal breaker for me. I think I will try another solution.