If you haven’t heard of the plans by the Australian government to filter or block ‘illegal’ content on the internet in Australia, then go here and read about it.
One needs to understand the stated goals of Senator Conroy, and of the Labour party (that I voted for, for shame) so that you can understand what it is they are trying to do. They have used weasel words fairly effectively up to now, so not everyone has a clear understanding of their intent, but in a nutshell, it is this.