No...... I would have thought that it would be illegal for a parachutist to enter cloud and lose visibility with the drop zone just like it is for pilots losing visibility.
Parachutists don't hold an IFR rating to fly in IMC conditions or have suitable instruments except gravity to navigate and with these wing suit thingies they can travel a long way from where they left the aircraft, well outside they dedicated/allocated drop zone.
I just don't get it.
The fact you don't get it is down to ignorance, visit a drop zone and talk to the folk. What they do is in accordance with rules laid down by CASA. It's not illegal for pilots to lose visibility if they happen to be abiding by the rules, some pilots of plastic fantastics obviously don't qualify.
IFR rating for freefall through cloud without instruments - you're joking right? What do you think the slipstream generated by freefall is telling you?