[Brian]

If it helps at all, I sync my entire database to all my machines, but I have a Perspective set up (using the Focus command) to show me only my work-related projects; that's my main view when I'm in the office.

Would it work for you to do that at work, and something similar at home to show only your home projects?

(Hopefully) same effect on your workflow, but wouldn't complicate the sync code as much. ;-)