If you haven't shut LW down since the files were being shared, and if you have NOT chosen to automatically clear completed uploads (in tools > options > uploads) then it's possible to see whatever files have been uploaded to IP addresses by clicking on the 'Monitor' tab & looking at the upload pane.

This info only lasts for a LW session...so once you shut down LW, all the upload data for that session will be lost.

Good luck