Yes, this is possible as of Centova Cast v2.2.0. Note that if you upgraded to Centova Cast v2.2.0 from an earlier version, you'll need to update your media library, then click the "Perform full library update" button to pull in any cover images from your existing library.
Centova Cast looks for cover images in the following places (in order of preference):
If Centova Cast detects any of the above images during a media library update, it will automatically import them and use them as the cover images for the albums associated with the track.
Also note that when Amazon® integration is enabled, cover images retrieved from Amazon.com will