If you think about it, thats what a lot of my alt-net posts enable (although I was tailoring it to data, a lot of delivery methods were pretty physical)

Take a look at it.

Take IPN for example

ipn:node_number.service_number

The rest of the contact graph is only interested in the time it takes to reach each node, but only the sender needs to know where to deliver to each reciever.

The service number could be used to define that we're delivering a package rather than data. That way we aren't routed through nodes that only do data transmission.

I do believe if we really think through this, it would be possible to come up with something.