You are only sharing what's in your LimeWire (LW) Library. To confirm what you're sharing go to LW's menu bar, Tools -> Options -> Sharing. That will list the folders you are sharing & where you can add or remove.

To see if anybody has seen particular files, go to LW's Library window, select one of your shared folders, look to the right columns labelled "Hits", as that will show you which files & how many times have been found in people's searches even if they were not specifically looking for that particular file.