I am not sure what an "ann" search is that you referred to, but have you searched the entity's name at ASIC? If it is a Company it will come up in the ASIC database with the ACN. It may be that the real estate name is a
trading name rather than company? In which case you would need to look further (by way of extracts) to figure out who is operating the trading name etc - but, you could be met with Trusts and un-named trustees. - Are you in a position to have the client confirm what's going on in writing? Maybe send him an email to confirm your discussion & understanding and have them confirm the entity details that has actually been entered into VA?
As previously posted, ASIC records will also be updated when an administrator or liquidator is appointed and you will see in the company status that it's under administration rather than 'registered'.
As to jeopardising his ability to direct other companies, the answer is 'maybe'.. it would depend (most likely) on whether he has previously wound up companies before this one and probably what the financial state and situation is. If this is the only administration/liquidation he has ever been connected to, based on my experience it's unlikely they would ban him from directing other companies -
I used to work for a company that entered VA - the director was also director of another company at that time and has since registered and directed several more - it's only now that one of the companies is in liquidation by court appointment rather than VA (and this has happened about 6 years after the VA) that someone has finally made an application to ASIC to prevent him from directing further companies.
As others have mentioned, you should receive correspondence in due course that the administrator will send to all creditors and they will likely then ask you to submit a 'proof of debt' form that outlines what you are owed and then this will be accounted for in their future reports and statements etc. If there's money left over then you might get some money.
Just my 2c

Good Luck!