This should work:
local ClickDetector = script.Parent --The ClickDetector
local AllowedTeam = game.Teams.AllowedTeam --Direction to the Team which is allowed
ClickDetector.MouseClick:Connect(function(Player)
if Player.Team == AllowedTeam then
--Whatever you want to happen if the player clicks and is in the team
end
end)
Make sure its an normal Script, not an Module or Local Script