"Network code" as described here isn't the academic definition, I think he's just describing colloquially "i'm using a code in my network". The technical definition is a Packet Erasure Channel [1], which any erasure code [2] can deal with. Network coding is a more unexplored technique where routers in the network combine packets in various ways that are better than regular routing: see the example at [3].

[1] http://en.wikipedia.org/wiki/Packet_erasure_channel

[2] http://en.wikipedia.org/wiki/Erasure_code

[3] http://en.wikipedia.org/wiki/Linear_network_coding#The_butte...