Stumbled on this scrap: Jung wrote that

For two personalities to meet is like two different chemical substances: if there is any combination at all, both are transformed. In any effective psychological treatment the doctor is bound to influence the patient; but this influence can only take place if the patient has a reciprocal influence on the doctor. You can exert no influence if you are not susceptible to influence.

(C.G. Jung, CW, vol. 16, para. 163)

This is close to describing Moreno’s Tele with the emphasis on reciprocity, ie a flow both ways.