It is my understanding that you can not log in to FusionCash with a different IP address other than your own, no matter if you are out of the country or not. The terms of service say this:
"Users must log in and use FusionCash on their own personal computer and internet connection only. The use of a FusionCash account on a public or shared computer, or public internet connection is grounds for disqualification. You may not access your FusionCash account on the same computer or internet connection as your referrer, referral, or any other FusionCash user. Violation of this term may be considered grounds for disqualification of any and all users involved."
Hope this helps.