Luton caseta control integration?

They have said several times that it is not on the current roadmap.

Since both Lutron Caseta and SmartThings have an IFTTT channel, you can get indirect integration that way. It’s pretty good for things that are on a time schedule or for the window coverings, but there’s typically too much lag if you want to turn on the switch and have a light come on as someone walks into the room.

There is a community member who has built his own hardware bridge for integration with Lutron RA, some people are looking at it for Lutron RA2 (which is what Lutron Caseta uses) but nothing official.

If Lutron Caseta integration is necessary to your project, I would look into Staples Connect instead. Or HomeKit (perhaps with the Insteon HomeKit bridge thrown in as well).