Each person can only create one account. A user can be both a Worker and an Employer at the same time. Creating multiple accounts will result in terminating of your accounts
How Many Accounts Can I Have on Picoworkers

Picoworkers is a Microtask website that offers the opportunity to freelancers to work online. In short, they are the marketplace for freelancers. They have been operating for quite a while and have served many satisfied employers and workers.