I use a "Dual D Ring" (DDR) system on my vest for holding my net and my wading staff.
The DDR is a part of a velcro hook and loop system. The upper D ring is on the hook portion and can be removed and the lower D ring is integrated into the loop section. This is sewn on the lower left side of my fishing vest.
The end of the wading staff (Folstaf) cord is attached to a french clip
When I deploy my Folstaff I clip the end of it to the permanent D ring with the french clip so I can let the staff go. It will remain attached to my vest. I release the staff if I want to tie on a fly or use my landing net, etc.
The other D ring is attached to the handle of my net by a coiled net holder. The top of my net is attached to the by a magnetic net release to the D ring on the top rear of my vest.
This DDR system allows me to drop either my net or my wading staff and they will remain attached to my vest. I can never lose my net if it gets hung up by a tree branch and falls off while walking to or along the river. Yet I can use the Velcro release to free it from my vest if I want to let my fishing partner use it.
I bought this DDR system at a fly shop but it has been years since I have seen it for sale. It can be easily made with plastic D rings and velcro webbing.
In the photo below you can see the two D rings. The net is attached to the up one that is attached by velcro and the lower on is the one that is permanent and used for the wading staff.