Is it possible to log into my mac from another mac on the network? Something like as NAS setup where I can log into my user account from say the kitchen computer?
Do you want to view/edit files on the other machine or view/interact with its desktop as if you were at the machine?
You can easily do that with screen sharing: http://support.apple.com/kb/PH14148
That is about as good as it will get without file sharing.