The new law, which came into force on January 6, requires internet bloggers, and anyone making a comment on next month's state election, to publish their real name and postcode when commenting on the poll.
The law will affect anyone posting a comment on an election story on The Advertiser's AdelaideNow website, as well as other news sites such as The Punch, the ABC's The Drum and Fairfax newspapers' National Times site.
It also appears to apply to election comment made on social networking sites such as Facebook and Twitter.
The law, which was pushed through last year as part of a raft of amendments to the Electoral Act and supported by the Liberal Party, also requires media organisations to keep a person's real name and full address on file for six months, and they face fines of $5000 if they do not hand over this information to the Electoral Commissioner.
The Right to Know Coalition, made up of Australia's major media outlets including News Limited, publisher of The Advertiser , has called the new laws "draconian".
"This is one of the most troubling erosions of the right to free speech in Australia for many years," Right to Know spokeswoman Creina Chapman said.
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