I can provide some general information about how dissociative identity disorder (DID) and other dissociative disorders with alters are understood.
In individuals with dissociative identity disorder (DID) or similar conditions with distinct alters, there can be a range of experiences regarding privacy and communication between alters. These experiences can vary widely from person to person, and each individual's internal system may have its own unique dynamics.
In some cases, alters may have limited awareness of each other's thoughts and experiences, and there might be a degree of privacy between them. Each alter may have its own stream of consciousness, thoughts, memories, and emotions, which may not always be shared or easily accessible to other alters within the system.
On the other hand, some individuals with DID may experience more interconnectedness and communication between their alters. They might have co-consciousness, where two or more alters are aware of each other's thoughts and experiences to varying degrees.
Additionally, some individuals with DID might have what is known as "inner world" experiences, where alters can interact and communicate within an internal landscape that is unique to the individual's system.
It's essential to understand that dissociative disorders, including DID, are complex and still not fully understood. The experiences of individuals with these conditions can be diverse and may evolve over time as they engage in therapy and learn more about their internal system.
Therapy for individuals with DID often involves promoting healthy communication and cooperation among alters, fostering internal cooperation and understanding, and working towards healing from past trauma. A qualified mental health professional with experience in dissociative disorders can help individuals explore and understand their internal experiences in a safe and supportive environment.