No, Conzilla doesn't support connections to databases, everything is
based on triples and it would require a triple store instead.
Even if Conzilla had support for random RDF sources it wouldn't work,
the visual information for displaying a conceptual model would be
missing (which could be solved by using an algorithm for arranging
concepts automatically in a map).
Feel free to contribute some code, everything is Open Source.
Best regards,
Hannes