Hi,
You can pull out a report from Web Tracking report.
From web tracking, you can enter the user or client IP address on certain time range and also filter based on websites, or transaction types (allow, block, etc).
And if you click on "Advanced" link you can make further filter.
Web tracking is in GUI -> Reporting -> Web Tracking -> Proxy Services tab
Another way is that to check the actual raw logs from CLI (called accesslogs)
You can do "grep" command and select accesslogs number and put your user or client IP address as the regular expression to list out what sort of traffic that user requesting.
Regards
Handy Putra