I am very interested in participating in operating sessions in TRS19. I had an HO scale layout that took up my whole bonus room, and hosted operating sessions using index cards and paper clips. One inspiration for that was a well-written book titled "How to Operate Your Model Railroad" by Bruce A. Chubb. While I no longer have my HO layout, I try to attend card order sessions at a live steam club when able.
A few years ago people were running the UMR multiplayer layout and there was a rule called "Car Tagger" which allowed you to tag cars with destination industries. Unfortunately, it does not work with newer versions of Trainz.
In my limited spare time, I have been working on writing a card order rule that will hopefully replicate the card order process in Trainz.
-Al