Remove Extra Domains From Login Options?

Remove Extra Domains From Login Options?

For some reason after enabling domain login a collection of extra domains/workgroups appear.

Is there a way to limit the options which appear to just Local and the Domain.

Below is a example of what is there
COSTCO
COSTCO.COM      (Domain)
WORK GROUP
Local Authentication

Failing the ability to remove the additional options is it possible to set the default?

Thanks