There are four roles you can grant to the users for them to access all the data about specific apps:
App Manager: The App Managers can edit all aspects of the apps they have access to, and can add users to those apps. These users can be granted limited app access.
Developer: The Developer user has access to My Apps and Resources and Help. They can upload binaries to iTunes Connect and manage internal TestFlight users. These users can be granted limited app access.
Marketer: The Marketer role is for users who manage marketing materials and promotional artwork. Users with the Marketing role will be contacted by the App Store team if an app is chosen to be featured on the App Store. They can update app metadata and request promo codes from My Apps. These users can be granted limited app access.
Sales: The Sales role has access to Sales and Trends, and iTunes Connect for iOS. They can only download the full sales reports if they also have the Reports role. Sales users can be granted limited app access.
https://itunespartner.apple.com/en/apps/faq/Users%20and%20Roles_Overview
All of these roles support limited app access, which is the ability to restrict accounts to only view certain apps. Granting Admin or Finance automatically provides the ability to see every app associated with the developer program membership.
You can configure limited app access…