Currently, the Report Server does not support multitenancy. We have a feature request for such functionality - you may vote for it in our Feedback portal
The approach from the Change connection string based on user
thread should work with many users but is not applicable for Report Parameters.
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal
and vote to affect the priority of the items