I am also seeing eyewond.fcod.llnwd.net being accessed by Firefox despite the fact that I chose to deny access when prompted.
eyewood.fcod.llnwd.net is owned by Limelight Networks Inc. (as you can see
here), which is a Content Delivery Network. That particular page is based out of Europe and based on their corporate
contact page, the page is probably hosted out of the UK but that's just a guess. Now, I know that is more info than you needed but I'm just trying to assuage your concerns. If it helps,
here is an article that mentions Limelight that should help assure you that it is a legitimate business. Or, you can read their Wikipedia
article. In fact, as you can see in
this article, Apple uses Limelight. Where did you see this URL - what page were you trying to visit when you saw this URL being accessed?
As for who is connecting to your router (should anyone be doing this), it would be much easier to walk you through the process of both checking who is connected and whether wireless is enabled if you give us the make and model no. of your router. Actually, as a quick test, do you see any wireless networks listed that look familiar to you?