If you are willing to convert your scan data you could try importing your point cloud data sets using Fusion's "File > Import > Alembic Scene..." menu item.
As far as getting LIDAR data into an Alembic format:
Houdini Indie has a "
Lidar_Import" node that can be used to bring in .e57 and las LIDAR scan files. Then you could output an alembic .abc file which could be used in Fusion's 3D workspace.