Hello! Some information on PER supervisors can be found via this link - but I've lifted the relevant section for you and added below. There's also a lot of useful info on our PER FAQs page.
In most cases your practical experience supervisor will be your line manager or the person you report to on particular projects or activities.
In order to sign off your performance objectives your practical experience supervisor should be someone who:
* A qualified accountant is a member of an IFAC (International Federation of Accountants) member body and/or a body recognised by law in your country.
Hope this helps :)