HFM security classes issue

I have assigned security classes to two different dimension of an HFM application, Entity and Scenario. I have assigned to a group of users read access to the two classes (done from shared services console). Resulting access: the group of users can read data on EntityA AND ScenarioX. I.e. users can't read data on EntityB, ScenarioX or EntityA, ScenarioY. Is there a way to have assign access to EntityA OR ScenarioX, so that the group of users can browse all the data of ScenarioX on all entities, or all the data of EntityA on all the scenarios?

Thanks