Certified GKH Gardening Expert
You can, but it seems like you already know what needs to be done in order to keep them alive each year. During dormancy, they will need to be dug up and stored in the refrigerator to satisfy the cold stratification requirements. You will want to chill them for 6 to 8 weeks below 40F and above 34F in order for them to rebloom.
This article will help you with the care of Oriental Lilies: