There was recently a guideline announcement from FinCEN.
Note that the FinCEN guidelines being discussed widely make no mention of Lightning Network or Lightning devices.
Casa is not a financial firm or law firm and cannot advise on personal legal matters with running any kind of networking device in your home or office, whether that be a networked camera, fileserver, or Casa Node. We recommend speaking with a lawyer in your state or country if you have questions.
Casa has always worked to comply with federal and state law, and will continue to as these laws are clarified and updated.