If you're connecting to a work network and your home network, it might be handy to manually control how traffic is routed.
www.howtogeek.com
Explains it better than I can. You really only need one entry that routes everything to the IP of your internet connected NIC which should then forward everything that isn't part of your local network to the internet.
should be something like: route add 0.0.0.0 0.0.0.0 your.internet.connected.nic.gateway your.internet.connected.nic.ip 1
This (and my previous suggestion) assumes the packets are getting to your computer so this routing command can take effect. This would require whatever is generating the packets (NI controllers or whatnot) to be sending them to your computer when they wan't to get to the outside world, so their gateway should be your development NIC.