Understanding if fortigate 600E have ip or mac binding

Im a newbie net admin and and i created another admin,g-admin, that can manage local guest accounts only . g-admin has only a trusted host of 172.16.16.50/32. The ip of the machine is reserved to its MAC address, my question is, is it possible to bind that ip to that mac address only , because whenever i try solution found on the internet , after the g -admin’s machine is turned off and i open another pc and manually input the ip , i can use its ip. Is there a way to prevent that, thanks! Sorry for my english