Scripting Jobs To Certain Groups?

Ok, Im looking to make a certain job donator only… BUT idk how to do this i run through ULX and i know i need to change it in the shared.lua but im looking for somone to help me with this / explain how to do this. Im new to lua and i really only know basics to this.

P.S - sorry for so many posts today im a nooby coder working alone so… server depends on me.