I frequently use ssh to log-in to my machines...
However, I have limited the access with a firewall so only my machines can ssh to each other.
But I would like to be able to SSH from anywhere. So, basically, as far as I can tell, you can SSH into OSX with any of the user accounts that are available on that machine.
I would like to set it up so that only one of the users can SSH in, and the rest of the user can't. Is this possible?