There are use-cases where certain users or client IPs need to be given access restricted to only the Analytics node(s) . While it is possible to grant such users read-only permissions at the database/collection level, and have them use the ANALYTICS replica set tag in their connection string URI, it might still be possible for those users to connect to a Primary or a Secondary node (when not using the Analytics replica set tag) and run their query there.
Therefore, a feature that will either restrict specific users access to only the Analytics node(s) or a functionality that will restrict access from certain client IPs to only the Analytics node(s), will help in such use-cases.