Blender compositing nodes in Luxrender

Can i do compositing on Blender and later export it to Luxrender?

To what end? Compositing is a 2D process that happens after rendering. Why would you export your rendererd, composited 2D images to Lux?

what i meant was can i export my .blend file in such a way that when i stop the render in luxrender, it performs the compositing process, in lxurender