Reason Party MP Fiona Patten introduced the proposed bill to Victorian Parliament this week, saying vilification legislation that already exists for race and religion should be extended to include hate speech targeting people for their gender, disability, sexual orientation or gender identity.

She said protection was required for those who are threatened online with messages calling for them to be killed or raped.

Mr Quilty voted against her, saying it would also allow speech that does not incite hatred to also be censored.

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"The sum of these changes will mean that a person could be prosecuted for saying something that they do not intend to be offensive, that they do not believe is offensive and that does not actually incite hatred or contempt," he said.

"Defenders of this bill will claim that the bill does not censor speech - in fact this is the sole function of this bill.

"They will claim that only wrong speech will be censored, but I do not trust this government or any government to decide what speech is wrong speech on my behalf."

He said Liberal Democrats believed in "the revolution of reason and liberty over superstition and authority".

The proposed hate speech legislation has been sent to a parliamentary committee, meanings reforms are unlikely to occur until next year.

Premier Daniel Andrews said if the federal government passes its proposed religious freedom bill, that could affect anything Victoria does around hate speech.