is it possible to turn team 4 white so they look neutral but still attack you and your team still attack them ?
No, there is not. On the minimap, natives will always appear yellow, as will their command posts.
a pity i guess tam 4 will have to remain red then though it turns out team 4 can have vehicles and also its possible to give team 3 and 4 a reinforcemnts counter though you can not see it.