Thank you very much Jonny for your answer and help.
I already watch this video but, I will do it again carefully, maybe I missed something.
Perhaps, I didn't explained myself in an easy way. I will highlight my request;
"to block a New User from changing Fader settings and everything in the Scene, with the exception of the Master Fader, just allowed to move the Master Fader and the Mute Buttons. No allowed to change Projects/Scenes."
In my case, I created the "Worship" User, with the limitation in the Master Fader, but, still this User can do;
Change the mix balance, "MOVING THE CHANNEL FADERS", by accident or on purpose, causing trouble in the Mass.
Change to other Scenes and Projects and move the Channel Faders, making a mess in the mix and Worship service.
Change the Master and Channel FADERS of the Aux mixes, Subgroups, Matrices and FXs.
It does not matter that the Master Fader of the Main Mix is limited,
messing with the channel Faders and Aux Mixes is STILL POSSIBLE to CHANGE.
I hope this time I explained my self better. Thank you again for your great support and to all the Team at Presonus.
If by any chance, my concerns are wrong and there is a way to do it, PLEASE, let me know how.