  We demonstrate that in the scaling limit the phenomenon of spin-charge
separation as encountered in Luttinger liquids defined on the lattice can be
associated with the emergence of local Ising symmetry. This Z_2 gauge field is
of geometrical nature (sublattice parity) and the Luttinger liquid corresponds
with the critical point where the symmetry is on the verge of becoming local.
We argue that in a true one dimensional superconductor the local symmetry will
be fully realized as long as the geometrical structure associated with
spin-charge separation is maintained.
