Yes, it totally is. You’d just need to click on register on the top left corner just under the Lucky Luke’s logo.
Responsible gambling doesn’t allow you to have more than one account. Everyone is entitled with one.
In order to withdraw, you’d have to click on the green plus near your balance under your username. There are different banking methods that are available. You’d have to choose one. Verify your account and enter your details. It is that simple.