Hi,
If someone want multi users, there is a patch to install via TWRP, it's compatible with version 1.8 to 1.9
This patch will patch the framework.jar file.
The max number of users is defined in the build.prop, actually it is set to 4.
I have tested on mine, it's working !
In case of problem, reflash via TWRP the following file to restore original file :
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