Until v6.2, there was no way to restrict access to the Query module. This feature is useful if you want to restrict certain users from:
Creating new queries.
Exporting data (can only view data in the UI).
Able to view and run the saved queries.
Create and Update
Able to create new queries, import the query definitions and update the saved queries
Able to delete the saved queries
Export the query results data
Researcher: Can run saved queries and Export/Import data.
All other users: Perform all operations as before.
For more information on privileges, refer to the wiki page.