For a model-driven app, you can assign different security roles to the users based on different user types.
In that way, the users will only see the create, edit or delete option based on the privilege defined in their security role. (e.g. the user will not see New or Edit button if the user only has Read privilege for a specific table)
You also restrict the access to the form based on the security role so that you can show specific form to the user based on the security role. (e.g. show all fields to the user admin and specific fields to the basic user)
Or you can even create multiple model-driven apps and assign different security roles so that the user can only access the app relevant to their role.
Here are some useful resources
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WarrenBelz
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