There's no restrictions on liquids and gels for domestic flights in Australia unless operating from an International terminal. I take bottles of water with me through security all the time. The restrictions do apply to international flights though.
http://www.infrastructure.gov.au/tra...AG/faq.aspx#33
34. Do these measures apply to domestic passengers?
No. The restrictions only apply to international flights.
However, occasionally domestic passengers travel on an international aircraft while it's travelling within Australia (for example, travelling on the Sydney to Melbourne sector of a Singapore-Sydney-Melbourne flight). In these circumstances, the domestic passengers will board their aircraft at the international terminal, and will be subject to international restrictions.