def is_accessible(self):
    if current_user.has_role('superuser'):
        self.column_list = superuser_colum_list
        self.form_columns = superuser_form_columns
    else:
        self.column_list = user_colum_list
        self.form_columns = user_form_columns
    return super(MyModelView, self).is_accessible()

# Has same effect as

def is_accessible(self):
    return super(MyModelView, self).is_accessible()

class MyModelView(SafeModelView):

    #[stuff]

    if current_user.has_role('superuser'):
            column_list = superuser_colum_list
            form_columns = superuser_form_columns
    else:
        column_list = user_colum_list
        form_columns = user_form_columns

    #[other stuff]