4.2 jelly bean - How to migrate 4.1 primary user's app data to new 4.2 secondary user?

My wife has been playing games (Angry Birds Star Wars if that makes a difference) on my Nexus 7 which I have just updated from 4.1 to 4.2. Android 4.2 lets you have multiple users on a single device, so I would like to create a new user account on this device which has all of her game saves.

Without root, is it possible to migrate specific applications data to a new user account on the same device?