There is an ePO dashboard from the Tool exchange that will report repository usage in a fashion. (for ePO 4.6 only)
The only issue with your request is that the laptops will need to connect back to the corporate network at some point so that they can upload thier events back to the ePO server so that you can then report on them.
Thanks a lot. I imported the dashboard you shared and i was able to genarate the report.