Have you found any assistance with this question on the KDB+ site?
Hi Patrick, sorry about the delayed reply..
After extensive research, I found that you cannot perform a live connection to Kdb+ at the moment. For now, I am able to enforce data security at the application level using Tableau Server accounts & permissions on a per-workbook basis. If Tableau releases native support for Kdb+, it should be a simple upgrade to Live Connection.