I don't believe this is possible inside Workspace at this time.. I would love that feature too (I highly suggest you post that as an idea and I will be your first upvote!)
However, I think for right now, you will like have to take this outside of workspace... Possibly using Report Builder in Excel (and using VBA to check through data an report on it), or maybe create a Data Warehouse export of relevant data and process it in a SQL program; or even use Raw Data Feeds to process the data via SQL (note on this, the Raw Data feeds are really raw, and you will need to process the data to make sure it excludes data that shouldn't be included in your reports - this is a big task if you are just starting).