yes for some peoples internal system of alters it is possible. for others it isnt.

for me it was possible....I had one alter that was not very forth giving with my therapist, this alters job was to protect the secrets. this alter got so angry at my therapist that she refused to talk to my therapist or anyone for months on end. I couldnt even hear her voice in my head during this childish "I wont talk to you no more" temper tantrum lol

eventually she had enough of the others telling secrets to my therapist, and went back to normal of protecting secrets again. lol

only you and your treatment providers can say whether its possible with in you.