dinkeyes

Here's the situation: I've got a laptop that I'm gonna use in and out of the office. At the office I will be connected to a domain and out of the office, obviously not. Now, I can't figure out how to combine my local user account with my office network account so that when I log in to either of them I will have the same desktop and settings, etc. Is this even possible? Thanks for putting up with my ignorance.