with an "Aux Send" you can route the tapped signal to the internal input of an output bus;
the output of an output bus is a set of JACK output ports, so you may connect them externally to anywhere as long as there are JACK input ports out there; note that routing outputs to outputs makes no sense.
with an "Aux Send" you can route the tapped signal to the internal input of an output bus;
the output of an output bus is a set of JACK output ports, so you may connect them externally to anywhere as long as there are JACK input ports out there; note that routing outputs to outputs makes no sense.
hth.
cheers