It has been recently reported that there’s hidden code in Jelly Bean that allows it to support multiple users. This means that you can have multiple users log in and out of the phone like on desktop operating systems. Despite being almost completely coded, there wasn’t any discussion about it during Google I/O.
That doesn’t mean it isn’t usable, because it definitely is. XDA Recognized Themer zanderman112 has written a very basic tutorial on how to get multiple user support on Jelly Bean ROMs. While written in the Sprint Samsung Galaxy S III forums, it should be universal for all AOSP Jelly Bean ROMs. To prove this, XDA Member Advocate Admin and Spirit of XDA egzthunder1 was kind enough to test this on his ASUS Transformer TF101 and it worked.
To get a second profile, users must first be rooted and have Terminal Emulator installed. From there, users open Terminal Emulator and type the following:

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