In order to modify the individual user list in Confluence

• Navigate to Space tool--> Permission
• We can find the details of all users available in the particular space regardless of Groups to which they belong to.
  
  
  
  
• Navigate to Edit permission under under Individual users
  
  
• We can perform 3 operations 
    1. Deselect-It removes the user from all permissions granted here and removes from the list
    2. Select All- It allows to select all the permission options available.
    3. Add- It allows to Add new users to the permission list under Space Permission.