iUsers to Create User Accounts on the iPhone

One of the things missing in the iPhone is to create as many users as with conventional computers, it's necessary if the iPhone is used by several users, from Cydia comes the solution with the hack iUsers.
Requirements: Have Jailbreak the device
With iUsers can create users who want to access from the Lockscreen with a password to log on, I think Apple would have to think about this for now we