I would expect that this law would also extend to certain neo-Nazis who use other symbols that are different form though still modelled on the "Hakenkreuz" (swastika in English).
Your are right. That should concern some forbidden neo-Nazis-partys like FAP and there symbols. But I do not know exacly which symbols are allowed and which are forbidden.
That means, it depends what you want to say by showing them, if this is allowed or not.
--Ivo Köthnig