You can see who is accessing a View from a given workbook, and who is accessing a published data source using the TS Events data source I built. However, there is no auditing on connections that exist as a connection within a workbook, which were not published separately. If all you want is to make a tweak to the stock admin views, then you can pull them out of Tableau Server and add the column you feel you're missing, if it exists.
Thanks! That is exactly what I was looking for.