Sure you can. Otherwise, you wouldn’t be able to test the features of your workflow that require more than one users to be logged in at the same time. All you need to do is access the Backoffice admin portal from your Developer Dashboard, and on the Users screen, click the New user link in the top left corner. This tutorial page has all the details.

However if you’d like to collaborate on a project with developer colleagues, we suggest each of you sign up for a separate account (see the related question below).