I think there a very simple way to enable the Multiusers functionality in this device, and i already used it and worked perfectly.
(My device is sony xperia z1, android 4.4.4, stock rom, rooted and deodexed):
Step 1: Install GravityBox Module (last version).
Step 2: Enable Lock Screen Rotation : go to the GravityBox settings menu then under Status bar tweaks --> QuickSettings Management then enable the "lock screen rotation".
Step 3: add this line to your "build.prop" (or use any build.prop editor from the play store):
Note: add the above line under the "ADDITIONAL_BUILD_PROPERTIES" group codes in the build.prop, and don't forget to check the same permissions for the "build.prop" as before.
Step 4: REBOOT.
After that you will see a new entry in your system setting called "users" which you can add and/or edit your user profiles.
And when you rotate your lock screen you will see all your profiles to be changed directly from the lock screen.
DEVICE: HTC One x+ (HTCdev unlocked, Rooted)
ROM: Android Revolution HD 8.0 by Mike1986
KERNEL: Stock kernel
FIRMWARE: 2.18.401.2 CL231174 release-keys
BATTERY: 2100 mAh stock Battery
RECOVERY: CWM Recovery v0.3
MODS: All in one tweaks by lesscro v.2.9.0
Lyapota ModPack v6.6 + Ressource Manager v2.7.5
PREVIOUS DEVICES: HTC Sensation with Android Revolution HDô 6.8.0 by mike1986
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