Yes!

You can choose to share your public profile with key collectors, galleries or clients by password protecting your profile. Here's how:

Click on My Profile in the left-side menu, and click on the Public Settings button at the top. Check the box Make my profile public. 

Scroll to the Public Profile Options box and check the box Password Protect your Public Page in the upper right-hand corner. Enter a secure password and hit Save. 

You can now share your profile with select patrons, galleries or clients by sharing the password with them.