Number of new cases dropping off in Australia. By the Australia Govt Dept of Health.
This might just be statistical fluctuation, but it is a good sign.
However, it may just be that only the exponential rise due to people bringing the disease in from overseas has been broken — due to border closures enacted a week or more ago. The separate exponential rise due to community spread within Australia might now take over as the main driver. We might just be seeing the lull between those two curves.
UPDATE: Here for comparison is daily new cases graph for South Korea, which went to a strong tracing regime while avoiding lockdown, and has contained its outbreak to just a few thousand: