You might ask, why do I want multiuser? Well... perhaps you give your phone to kids to play with on long trips. Or perhaps you want a "test" set of settings. Or you want to separate work and personal. Or maybe you just like to customize.
You do need the following:
2) A way to enable the lock screen to rotate (I suggest Gravity Box: http://forum.xda-developers.com/show....php?t=2316070)
3) A way to edit your build.prop. (Do it old school or an app such as https://play.google.com/store/apps/d...ld.prop.editor)
4) A current backup!
It is easy enough to do if you can edit your build.prop. This requires root, and YOU REALLY MUST BACKUP before you mess with build.prop. Seriously. Back up. It just takes a few minutes.
You can edit build.prop by pulling it to a PC and pushing it back or you can use a build.prop editor from the market (I used the one built into Android System Tuner Pro (https://play.google.com/store/apps/d....pmw.pro&hl=en) because I was feeling lazy). If you are doing it by hand the build.prop is in /system/ The line you need is:
At this point, it seems like nothing has happened. You need to go to Settings and you'll find a new entry:
If you click Users you should be able to figure it out from there:
Once you have set up a new user, you can press your user name in the settings to get to the lock screen. In portrait mode, it will look normal. But if you rotate to landscape mode you will see an icon for each user you've defined. If you set a different lock type/code for each (a PIN or a swipe code) you will have "some" security between users.
I did this on the 4.2.2 OTA that was slightly repackaged here: http://forum.xda-developers.com/show....php?t=2557523
You'd imagine it would work on most other ROMs that don't already support it, but BACK UP FIRST just in case!