You can identify any documents that have been added to the claim via the automatic CAC updates from the Added By column showing CAC Website:
If you are only interested in seeing documents that were uploaded to the claim through Gardiant Works, you can hide the CAC documents by checking the Hide CAC Documents box at the top of your document list:
Note: Don't forget to un-check the box next time you want to see CAC documents. When you check the Hide CAC Documents setting, it is affecting all claims, not just the current one.