looking at the possibilities in the reporting system i must say i don't believe you can retrieve such data from the ePO console.
I do believe that the agent reports the used repository after a succesfull update task, and that this input is stored in the database therefore. I believe this was done in previous versions of ePO anyway. So then you should be able to create your own query on the sql server to easily retrieve this info.
otherwise use some 3rd party tool on the designated distributed repository server to monitor the user of incoming port 8081.
Here's a thought: you could even use VirusScan Enterprise to do this! 😄
1. Create an access protection rule that reports incoming use of port 8081 and enable it on the distributed repository server 2. Than use the reporting part of the epo console to create a query that retrieves all reported events from access protection, filtered by this rule and f.i. the last 24 hours. 3. You could created a scheduled server task to let you email the output of the created query, and purge the database for these events as well.