Indeed, providing that you have access to a server license! Or you install an open source DC on a Linux platform.
I think this is getting somewhat beyond the desire (if not capability) of the average home user!
Well, OK, so I'm a programmer, so I have an MSDN subscription, so I have a "free" server licence. But it does mean that when one of the family machines is out that person can log onto someone else's machine and just carry on as normal without any faffing around with accounts and permissions.
I agree that most home users won't want to spend the money on a server licence, but I disagree that most users of family networks don't have any desire for the simplified user management.