Limewire uses bandwidth sending and receiving messages about searching and what you are sharing all the time. That is why if you are an UltraPeer you will be sending and receiving much more data because of the increased amount of connections.
If you don't think Limewire is working much it can be something else on your system. That's why I would recommend Comodo Personal Forewall. It will allow you to see active connection and how much data each process is sending/receiving.
What I meant by active tasks is this: |