One of the features that Google’s latest Android release (4.1 Jelly Bean) comes with is support for multiple users, a feature that can be enabled in AOSP builds, it seems.
Some enthusiasts over at XDA-Developers
have already played with the capability a bit, and provided us with more info on what secondary accounts on the phone have access to.
Apparently, they are not able to access data from the first account, including photos, contacts, music, shared app data and home screen layouts.
However, it appears that they will be able to access SMS messages from the first account, as well as recent apps and the default applications, which might be seen as a major privacy issue.
For the time being, the multi-user capability of Android is not ready for deployment, it seems, but users can have a look at how it works in the video embedded above.