Not easily, because there’s no direct integration between Lutron and SmartThings.
The simplest indirect integration is to use IFTTT, which allows SmartThings to tell Lutron to turn the switch on or off. But there’s no call back – – if someone turns the lutron switch on either at the wall switch or through the Lutron app SmartThings won’t have any idea that it happened.
There is a more complex integration built by community member which requires a raspberry pi is an intermediate host. @njschwartz is the author, and you can ask him in his project thread for details on how that works.