One of the event organisers is expected to be charged on summons with further offences. This man is not one of the two organisers who were arrested on Thursday.
Twenty-four of the fines were issued for leaving home for a non-essential reason. One person was fined $200 for not wearing a mask.
Police arrested two men who helped organised the protest on Thursday night.
In a statement released on Friday morning, a spokeswoman said an investigation was launched to find those responsible for organising the gathering.
Officers raided two properties, one in Mooroolbark and another in Chirnside Park, where mobile phones and a computer were seized.
They charged a 41-year-old man from Mooroolbark with incitement. The offence, in the Crimes Act, involves a person inciting someone else to pursue a course of conduct which will involve the commission of an offence.
The man was bailed and is due to appear at the Melbourne Magistrates Court on January 21 next year.
A 41-year-old male from Chirnside Park was also arrested on Thursday night, but was later released pending summons.