Octane is going to support full native motion blur in future releases, but Lightwave plugin has an option to use an accumulation buffer to make possible the motion blur effect for all objects, lighs and cameras transformations and deformations. Only the animation of instances are not supported currently by this feature.
There is a new options tab in the render target root node options where user can enable the multipass motion blur, set the number of passes and set the motion blur length. Each motion blur pass is going to render the number of samples set in the kernel node or the render time set in the render options, so for example if user set 100 samples in the kernel and render a 16 pass MB, the final number of samples rendered are going to be 1600.