Can't comment on FTP, don't play there. Here's what Stars had to say to me:
Thank you for your email.
In the event that you are no longer living in the United States, and can prove it, you are free to play on our site from your new residence. However, to do so, you will be required to submit proof that you are actually resident in another location to have your privileges reinstated. You will be able to keep your VIP Status, as well as your yearly VPP total (as of April 15, 2011).
Acceptable proof consists of copies of photo identification as well as a recent utility bill showing your new physical address. Just an address, without actual proof of residency, will not be sufficient.
Once you have moved, and have the necessary documents to prove your new residency, please email the documents to
verification@pokerstars.com and we will assist you further.
Warm regards,
Katja
PokerStars Support Team