I have not read anywhere that this is possible. Maybe someone may write a plugin for Lightroom that can allow use of the Publish feature to upload images to the Amazon Cloud as is presently done for Flickr, Facebook etc.
Have a look at this thread. Can I Export from 5.6 to the Amozon cloud? - Lightroom Forums
Lightroom can only organize photos that are on your local or networked drives.
This is a bit off-topic but since you are using the Amazon Cloud I wonder if you are using the Amazon Prime Photos storage. And if so, if you managed to view to RAW fotos in full size and not only as a thumbnail