http://www.casa.gov.au/wcmswr/_assets/main/download/caaps/ops/92_1.pdf
There is a difference between a ALA and a just a landing strip, biggest difference could be ability to claim insurance also notice in the regulations about flight training at ALA. I think a pilot can land a plane where he thinks it is safe and has permission.
Here is my landing strip ( paddock ) on google earth, the long strip is the normal operating strip, the others were cleared so in strong winds conditions I can safely land, the google photo was taken nearly 12 months ago. My aircraft is the only one that has ever used it. I do worry about liability and have marked it with a cross at each end and next to windsock post, the wind sock is removed after use and is not white or yellow but orange so it is not identified as an ALA. I will soon invite some to use but would not allow inexperienced pilots due to liability worries, would possibly write an indemnity note for a user to sign stating it is not an ALA but just a landing strip and to use at their own risk ! I personally have landed at a lot of bush strips in the past and was invited to be the first to land at a farm one way landing strip which had some interestIng features. At the moment we have had a lot of rain and the strip drains reasonable but not with the amount of rain at the moment, too wet in middle, can get out but would not be a comfortable landing for the J230, need a STOL.
I make it a point to stay away from neighbours houses so not to piss them off, no one has done anything but watch and enjoy. Have offered all neighbour flights and some have taken up the offer, the council was doing work on road and dropped in to look, comment how quite it was and hardly heard it, saw the shadow first.