When you combine all using only one Destinator and one Dispatcher, the code on the dispatcher allows to sort the incoming orders and divide it over the available Advanced Transporters.
Using the SendTo statement of the Advanced Transporter allows you to divide the products over the desired drop off points. I think you can use a label on the product indicating in which production state it is and depending on the status you can let it be transported through your model.
The example model "Network with Advanced Transporter", which you can find under, might help give you some insight:
I hope this helps you further, otherwise let me know.