Is it possible to have customers redirected to different url when visiting members only area?

I am considering eliminating marketpress and supporter in exchange for classifieds and membership. With membership, is it possible to set up a members only section (which is technically just the blog portion of the site) that has a different url? For example, my main web address is tutuology dot com. I would like members to be redirected to girlygirlbusiness dot com once they enter the membership area. Make sense?