How to achieve custom permission authorization using a plugin?

Hello all,

In my applications some role require custom permissions like - "customer moderator" should only be allowed to only view customers

I am able to insert a record in ACL ( Access Control List ) using a plugin - with a custom permission provider ( instead of StandardPermissionProvider)

I am planning to check permissions in view file and if the permission is readonly then i would hide the edit delete buttons.

but to load the view only I need to change code of CustomerController. because there code for

List()

method is written like this :

  if (!_permissionService.Authorize(StandardPermissionProvider.ManageCustomers))
                return AccessDeniedView();

I changed that to this :

if ((_permissionService.Authorize(PermissionProvider.ReadOnlyCustomers)) 
                || (_permissionService.Authorize(StandardPermissionProvider.ManageCustomers))){
     // no change here
}else{
        return AccessDeniedView();
}

is there any way I can achieve the same using a plugin? ( and not changing code of CustomerController )