By Jane Wardell and Elida Moreno SYDNEY/PANAMA CITY (Reuters) - Tax authorities in Australia and New Zealand are probing local clients of a Panama-based law firm at the center of a massive data leak for possible tax evasion. Other jurisdictions are likely to follow suit following the leak over the weekend of details of hundreds of thousands of clients in more than 11.5 million documents from the files of law firm Mossack Fonseca, based in the tax haven of Panama. The documents are at the center of an investigation published on Sunday by the International Consortium of Investigative Journalists and more than 100 other news organizations around the globe.