Is there a way that I can limit a user's view in Workload Analysis to one specific SQL Server instance? When I grant a user the Product Guest role, it appears that they can see all instances that were added to SQL Workload Analysis.
Not currently. The intent is to use the instance permission defined in Diagnostic Manager, but this instance-level security has not been implemented.
Restricted access could be controlled with a different IDERA Dashboard installation that only includes the instances relevant for a set of users.