Вот тебе пример.
customCheck = function(ply) return CLIENT or         
table.HasValue({"vip", "admin"}, ply:GetNWString("usergroup"))     
end,     
CustomCheckFailMsg = "Это только для VIP",
А вот пример в профе:
TEAM_TEST = DarkRP.createJob("Тест", {     
color = Color(255, 0, 0, 255),     
model = {"типомодель"},     
description = [[Тест]],     
weapons = {"test"},     
command = "test",     
max = 1,     
salary = 1,     
admin = 0,     
vote = true,     
hasLicense = true,     
candemote = true,    
category = "tesrt",     
customCheck = function(ply) return CLIENT or         
table.HasValue({"vip", "admin"}, ply:GetNWString("usergroup"))     
end,     
CustomCheckFailMsg = "Это только для VIP", 
})