Yes, you can!
The Babywearing Coats, Raincoats, Parkas, Vest, Jackets, Hoodies, Sweatshirts and Sweaters all can be worn while you are back carrying a little one.
Additionally, Angel Wings Coats and Jackets come with two Babywearing inserts, so you can wear a child on your front and a child on your back at the same time.