Hi @Skerratt19,
Welcome to Workshop. We trust that you'll get loads of helpful advice and project inspiration from our clever and creative members.
Do you have a specific product in mind that you want to attach to the cement blocks? A little more detail and perhaps even a photo might help our members provide you more useful advice.
In the meantime, I will tag the ever-helpful @Brad as he often has a quick and easy solution for questions like this.
Many thanks,
Jason
A couple of clip options for you.
https://www.bunnings.com.au/whites-mesh-panel-fix-clip-50-pack_p3060012
https://www.bunnings.com.au/arc-u-clips-and-tek-screws-20-pack_p1109324
50mm metal posts would be the way I would go and sorry @Jason I don't like the Bunnings post support so I would go with something like this -
https://www.paramountbrowns.com.au/products/fence-verandah-base/
Hope that helps.
Many thanks @Brad. Please let me know if you ever want me to pass on feedback to the Bunnings merchandise teams. I am happy to do so and am sure they would appreciate any feedback on how they can improve the range.