Oh, I guess it wasn't mentioned in the IC but I think it was Sorapo no Jutsu.<br/><br/>Clones can use techniques up to a certain rank, as I recall. Since Kawarimi is rank 1, they can use that. There is a seperate technique branching off of Kawarimi that involves swapping places with living people. Besides, it might not work- since I think both participants need to be mobile and Kaname was considered helpless..