class AccountViewMixin(object):
    """
    Modifies the queryset by filtering out objects not belonging to the user's account
    """
    model = None

    def get_queryset(self):
        account = self.request.user.get_profile().account
        return self.model._default_manager.by_account(account).all()

class AccountListView(ListView, AccountViewMixin):
    model = ModelNAme
    template...
    ...