Shown below is a screen shot of where I setup the computer name for a Toshiba notebook running Windows Vista.
You will need to find out where to do this for each of your computers. The default names that Windows sets up are usually not very intuitive; if you want specific easily recognizable names for your computers, you need to set that up inside the computers. You will note that the two computers whose setup pages I posted above do indeed show up using my selected names in my DIR-655's "Device Info" status page that I previously posted.
Once you assign each of your computers a meaningful (to you) name, you can easily find out which of your wireless PCs was the one in the log entry excerpt that you posted (because the computer name, IP address, and MAC address for each attached PC shoud show up in the "Lan Computers" section of the "Device Info" page, and also in the "Wireless" page.
Here is a screen shot of my DIR-655's "Wireless" page showing a notebook that I just associated with that router, and also an updated screen shot of the "Lan Computers" where I can also cross reference the computer name (RWS-6325) with the IP address and the MAC address. Sorry, but there is no "one place" where you can see all of the information that you want to see.
A well-regulated militia, being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.
When governments fear people, there is liberty. When the people fear the government, there is tyranny.