Australian four-engined fighter project?

A book review of “Australian-Built Aircraft, and the Industry” at http://www.ctie.monash.edu.au/hargrave/MEGGS_BOOK.html mentions very interesting projects.

“Apart from the thousands of production aircraft processed, the design projects undertaken, and the production programs investigated by CAC included the following:- Grumman Panther, supersonic fighters, Sabreliner, four engined fighter, Warrior air-superiority fighter, CA30-2F Macchi development, GAC-100 airliner, Boeing CH-47C Chinook, Yakovlev Yak-40, Grumman Tomcat, Lockheed Orion, McDonnell Douglas F-15 Eagle, and many others.”

It’s incredible they looked at a “four engined fighter” – WTH is it for? I’d appreciate if someone could give more detailed information about this four engined fighter and “Warrior air-superiority fighter” projects.

Cheers,
Sunho