Yes, it is completely legal in all Australian Chefs to have a private gathering at home. Although restrictions were very strict in all states until the beginning of May a lot of states have lifted these heavy restrictions and are allowing gatherings of 10 (in NSW) and 20 (in VIC) at your home. Chef & Staff are part of the allocated number as per the governmental regulations.
For more information always check the state government website in which you reside. This can be done by following the below Health links:
- Health Direct: https://www.healthdirect.gov.au/coronavirus-covid-19-information-by-state-and-territory
- Federal Government: https://www.health.gov.au/news/health-alerts/novel-coronavirus-2019-ncov-health-alert/easing-of-coronavirus-covid-19-restrictions/easing-of-coronavirus-covid-19-restrictions