1) Choose which domain you want to be indexed and do a 301 redirect to it. If you are running Apache you can do this in an .htaccess file in your root web directory. It would look something like this (assuming uniquevolve.com is the primary domain):
RewriteCond %{HTTP_HOST} ^(www\.)?uniquevolve\.com\.au$ [NC]
RewriteRule ^(.*)$ http://www.uniquevolve.com/$1 [R=301,L]
That will solve your duplicate content issues and will be good usability for your users (only one domain to keep track of)
2) Use canonical URLs. This may be considered redundant with #1 but you could always use this instead of #1 if you so chose to (although #1 is the better way to go). This tells the search engines which URL is the primary URL and to index that one, not any of the duplicates.