How to assign customer to multiple secure zones?

Hi,

I really need registered customer to be able to aisgn themselves to additional secure zone. In my particular case this second secure zone is a Trial zone, so when it expires customer have to have the first secure zone present so he's not out of zones he belongs to.

I have set a form up that asigns customer to the trial zone, but this creates addidional user and not aisgns additional secure zone to existing customer.

Is there a way to asign customer to two zones automatically (without touching admin console)? With JS maybe. I know its possible to specify the secure zone expiration date with JS when form is submitted so maybe theres a way to asign customer to two zones or better to make a form that acts inside existing secure zone and grants customer with additional secure zone.

To specify zone expiry date you use id="ExpiryDate" in form input field. Maybe there is input ID that asigns additional secure zone

to customer? Like SecureZone or similar...

Maybe theres a way to asign additional secure zones for existing customer through account details update page?

Please let me know.