Let me try and sum it up.
ESPN3.com and WatchESPN are still two seperate services, but use one website.
ESPN3.com - Everyone gets access to it with your Internet provider. LUS, Cox, EATEL, and many others give you access to this with your Internet service.
WatchESPN - You get access to this from your TV provider. Cox offers this, but not LUS or EATEL.
So since, you are not at home where LUS gives you access (but it is blacked out locally anyway), you must get access from the WatchESPN side of it, which you don't have. It would likely be blacked out anyway. I don't see how you can watch this game through ESPN today. Sorry...