I want to define Users rights and access (Country by Country)

I am having multiple catalogs in my code. I want to create backoffice user roles using IMPEX

I need to have a new user role (catalog specific) - admin business user for each catalog . When a country business admin logs in to backoffice/cockpit. The user should only have access to catalog specific data as listed below: (a) product catalog (b) content catalog (c) prices (d) discounts

i need to generate users and provide permissions and restrictions for them to be able to show only catalog specific data to the given user USING IMPEX

For ex: I have Catalog A, Catalog B, Catalog C. User A, User B, User C. User A should only be able to search and view only Catalog A related products, content, prices and discount. Similarly User C should only be able to search and view only Catalog C related products, content, prices and discount. User B, should not be able to view/search/edit/delete Catalog A or Catalog C related data