Yes. You're welcome to use an "artist name" (i.e. pseudonym) on your I Feel Art profile rather than your legal name.
If you choose to use an artist name, we won’t reveal your legal name to the public at any time. However, in order for I Feel Art to be able to verify legal names and identities, all artists must provide proof of ID.
To change your public profile name:
Step 1 – To access your profile information you can either select “My Profile” from the navigation menu or select “profile” in the dropdown next to your profile image or select “update profile” from the settings sidebar. 
Step 2 – On the Account Information page, enter your desired public profile name in the Artist First Name and Artist Last Name fields.