The rules say:
He may give the move to any player (including himself) whose colour is not represented in the pile just played.
But "not represented in the pile just played" before or after he played a chip on top of the said pile.
If after, then he won't be able to give the move to himself, because he is represented in that pile (he just placed a chip there)
If before, then everyone would be able to capture very easily, by giving the move to themselves.