Hi Elizabeth81,
AFAIK, unless someone has their location showing below username (within the forum), there's no way to tell where they're from. Browsing a host won't tell you.

Re your uploads: Have a look at shared files in your library. In the Uploads column, the number on the left is how many times the file has been successfully uploaded. The figure on the right is how many times an upload has been attempted. If you go to tools >options >bug reports >view example then scroll down to 'Recieved incoming this session'. If it says 'false', LimeWire probably has a problem with a firewall and this will effect others downloading from you.
You can always go to the Download/Upload part of the forum & have a look at the stickies, there's heaps of info and advice there.