The same laws regarding defamation apply in strata as outside, except for what they call “qualified privilege” which basically means that if I am critical of you as part of discussions related to the running of the building, and I do it in a non-malicious way, then I am probably OK.
For instance, if I say you are always parking in visitor parking and you consistently ignore notices to stop doing it (and this is true) then I am OK.
However, if I say you are a selfish B… and that this is evidenced by you parking in visitor parking … but you are also a trouble maker and a bit creepy and someone has overheard me say I’m going to get you because you ran over my cat, you might have grounds for legal action.
Having witnessed a couple of defamation actions at close quarters, I can tell you that you need deep pockets to run one, and nerves of steel to defend yourself, even when you are 100 per cent in the right.