Again, I have a different opinion to AmandaLouise. In level 2 training for IFS an entire 3 day block is devoted to applying it in working with trauma survivors, including those on the dissociative disorder spectrum. It most definitely can be successfully used with people who have DID. As I said my therapist and I use IFS and it works very well with my dissociative alters. Just go with what works for you and your therapist.