Looking for assistance in creating a report that would show which ruleset a request come from. Direct Proxy or WCCP. Not sure if that is already available out of the box or if more custom work would need to done.
An easy way to do this would create unique proxy ports for your direct proxy users and your WCCP users. For example, direct users would get 9090, and WCCP would be 9091.
If you have this in place already, then you can add it to the log files, and have Web Reporter parse the new column, and you can report on that.
Here is our best practice on adding log columns to Web Gateway, for use in Web Reporter: