Although you forgot to mention your country of citizenship yet on a general note you CAN look out for jobs in Australia with a tourist visa however you CAN’T do anything more than that. Yes, you definitely can not apply to any of the jobs there, which is generally stated in your visa condition.

The reason why I mentioned your country of citizenship earlier is that some countries are allowed to apply for a working holiday visa. This visa makes some tourists eligible to fund their journey in Australia while staying. There is also a proper list stating that individuals from any country except Canada, Ireland, and France within the age range of 18 to 35 can work to fund their journey while traveling to Australia. There are some integral conditions as well with this such as the individual from any eligible country must be having a passport. 

As your question is about ‘look for a job’, then you just want to do that, you may interact with people related to your field of work, however, you can not sign an agreement over them till you’re traveling. Nonetheless, if a prospect does get agree with you joining them remotely, then you surely can apply to that once you return from your trip.

Talking about not doing jobs there, what you can do is still left to be talked about. 

• You can volunteer for any work. Many tourists take active participation in volunteer work (not to mention, you should not get paid while doing this.) to know the country’s culture, natives, and history, or maybe to have a taste of the country’s professionalism. To find what makes the country similar or different. 
• You definitely can do any of your urgent job-related work. (Here, I’m talking about the job you have in your home country.) Yes, you’ve gone there to travel, but a lot of people, say, freelancers or businessmen do get any incidental work; that they do anytime they want, which is something anyone can do.
• You can do some domestic, home-related, or caring work; if you’ve come to meet a relative or friend of yours, or if you make some friends there.

If, by chance, you find yourself in a dreadful situation that you need to work there on an urgent basis, then what you can do is, apply for a new visitor Visa from the tourist stream, stating in your application that you need to work along with the reason for the same. Then, ask for the authority’s permission for the same.

This, however, is not so easy, yet not impossible. All you need to do is to show valid proofs of:

• Your financial struggling circumstances because of this trip.
• Your other private emergency reasons, such as medical ones, are to be allowed to work there. 
• Your reasons show that you and your trip companions (family or relatives), would not be able to return with you having this job.
• The only option left for you is to work there.

After this, it will be entirely up to the authority to give or not permit you to work in the said country.