Whilst I am going to generalise, I’d bet the person is a tenant.
Make it known to the strata manager and the committee the behaviour of this person. Ask the strata manager and the committee to contact the owner and make them aware of the tenants behaviour.
You may be able to get the owners contact details but as you are not an interested person as defined in the act, you are not legally entitled to see the OC records (to get the owners details).
Most strata will have a standard by law regulating the behaviour of owners, tenants and visitors. It covers dress and conduct. Your lease will include these by laws.
if you observe behaviour by this tenant that contravenes the by law, tell the strata manager to issue a notice to comply. If the tenant contravenes this by law again not only can he be fined but it’s grounds for his landlord to terminate his lease.
Other than that consider moving. Right now there are many properties for lease at reasonable prices.