normally not. But you can make it work
using GMFs SVGFigure class (from runtime.lite)
in combination with an IGraphicsAlgorithmRendererFactory
(such a factory enables using arbitrary IFigures in a Graphiti Diagram).
note, that there might be problems, e.g., if you export
a diagram to SVG while the diagram contains an svg figure which is
rendered pixelwise into the diagram, the figure will be
included in the exported SVG file as raw image....