Hughes hinted he would go above Moyes' head in his pursuit of England defender Lescott by suggesting City "were in conversations with the people who ultimately make the decisions at Everton''.
But Moyes said: "Lescott has had his head twisted in all of this.
"I hear that City think they are talking to people who make the decisions here, well that's me.
"I make the decisions, they have not talked to me and the player has been consistently told he is not for sale.
"He should get his head around that and get on with his career.''