Five names are given here for the Supreme Purusha who resides in this body. Upadrashta — the silent witness who watches everything. Anumanta — the one who gives permission. Bharta — the one who sustains. Bhokta — the one who experiences. And Maheshvara — the great lord.
All these names point to one being: the Paramatma. Like a single person who is at once the guest in a house, its caretaker, and its owner — the Supreme Self plays every role within this body while remaining one.