Icarus2001 - No they are not and yes they do.
Network have been a QF salaried & owned subsidiary since 2011.
All tickets except closed mining charters are sold on the QF website and link into the greater QF domestic & International flight schedules. Only a small portion of their flights now depart out of the Network Terminal.
Alliance & Cobham? Both privately owned separate entities that are subcontracted to the "brand" and doing very well at it still, I guess you'd say. Cobham's B717's though are QF property.