An autoflower strain is a strain that flowers without an change in the light cycle, so it flower on its own without the normal cutback in light hours. basically it is an internal clock that runs of in the DNA of the plant, but rather a unsteady one. this sounds handy at first but the base-type for this marijuana stains is a very unproductive one, so the potential of such strains is going against zero and so does the amount of buds the produce too.
also they can't be cloned really. the only one that provides from these strains is the seed bank selling such.
I don't think this means you can't grow them on a net trellis. I say go for it.
As for chicken wire, people have used it constantly for growing, so I say do it.