Conflicting advice on the NZ website:
Probable 'no' here.....
On flights operated by Virgin Australia within Australia
Airport
Guest limit for Koru members
Sydney 1 Guest
Brisbane 1 Guest
Melbourne 1 Guest
Gold Coast 1 Guest
Adelaide 1 Guest
Canberra 1 Guest
Mackay 1 Guest
Perth 1 Guest
Cairns 1 Guest
Access is only available prior to the departure of your Air New Zealand operated and ticketed flight on the same day from the same terminal. Children may not be brought into our partner lounges in addition to the applicable guest allowance for each partner lounge.
Elite, Gold and Koru members can use the Virgin Australia domestic lounges when travelling on any domestic Virgin Australia flight. Simply show your boarding pass and your Elite, Gold or Koru membership card at the entrance.
Virgin Australia Domestic Lounges within Australia are located in Sydney, Brisbane, Melbourne, Adelaide, Canberra, Gold Coast, Mackay, Perth and Cairns. The Gold Coast lounge is before immigration but can be used prior to both international and domestic flights.
http://www.airnewzealand.co.nz/partner-lounge-directory
It might be possible for the cities listed above, but not for other domestic VA flights (say BNE-TSV).
edited to add. Probable 'yes' here:
Domestic Australia lounge access
Elite, Gold and Koru members can use the Virgin Australia domestic lounges when travelling on any domestic Virgin Australia flight. Simply show your boarding pass and your Elite, Gold or Koru membership card at the entrance.
Virgin Australia Domestic Lounges within Australia are located in Sydney, Brisbane, Melbourne, Adelaide, Cairns, Canberra, Gold Coast, Mackay, and Perth. The Gold Coast lounge is before immigration but can be used prior to both international and domestic flights.
http://www.airnewzealand.co.nz/co-op...ustralia-group