Have you solve this one? Are you referring to how the Security rules are configured for ODBC connections within the data connectors?
This video is the best resource I've found for data connection security: Qlik Sense Platform - Securing and Sharing Data Connections
I think I did get there in the end, but I no longer have access to that clients site to check it. They were happy with how it was left for the POC I was doing, and if they go with Sense (and the indications are good) then I will need to get into the finer details of how they want security configured.
Thanks for the link - the video is indeed useful, as many of mto 's videos have been.