It all depends on how your network admin manages his network traffic.
Sorry, but no local computer changes will effect that. ( of course, if he allows you to change your NIC and install any software that you want, he may not be managing his network too tightly ) I suggest You work with him if you need to use "maxium" network resources.
Hope this helps
Comment heard from a Klingon programmer.
"Our users will know fear and cower before our software! Ship it! Ship it and let them flee like the dogs they are!"