binarydigit2002, iFone Anywhere can't do that yet, but with FreeSync you can change the ID of the iPhone itself Though it changes it only to 1010101010101010.
As long as both machines match up, you're good to sync. So, it does the task from the other end. So I only said that because changing you're buddys persistent i.d. on his computer is like asking him to see a nude pic of his girlfriend. sharing is caring!