Firstly, there is no breach of privacy involved in someone taking pictures of the inside of a property from outside the property (unless it is for some salacious intent, like catching people in an intimate moment).
Secondly, is this strata manager the same buffoon who said you needed an EGM to approve timber floors?
Of course the strata manager can send out notices to comply on the committee’s say-so. As long as you have had a properly constituted committee meeting to approve the Notice To Comply (NTC). The strata manager can even send NTCs on their own volition (provided they have the standard delegated powers).
I would be seriously questioning the strata manager’s competence here. They seem to have no idea what they’re doing. If they are part of a larger company, ask for a new agent. If they are a small, one-person operation, invite them to tender their resignation or face a complaint to Fair Trading.
I have a feeling the next thing you will hear is that they have to send out three warnings first. That’s nonsense, of course, but it’s the standard excuse for agents who are too timid to take decisive action.