So apparently, you can send crafting orders to your alts, however if they are on a different Realm you can’t send a personal order, but if you add them in the same guild as your main guilds being cross realm you can send a guild order and complete it that way.
It seems that this was something overlooked with the whole warband shabang, so you can use this “trick” or we can raise awareness to have it work both ways.
There doesn’t seem to be a reason to why it shouldn’t anymore since Warband banks break the cross realm AH system anyway.