Companys can and regularly do get details of which holders are buying and selling each day from their registry.
My understanding is that the ASX doesnt have this info, it only knows which broker is trading.
The details will only be available from the registry after settlement.
It is normal for companys to look at this info after any abnormal trading. Any manipulation such as the same entity trading to itself using different accounts would be easily recognised.
ISX Price at posting:
93.0¢ Sentiment: Buy Disclosure: Held