This premium tutorial provides the steps to set up a custom condition in Oxygen for outputting elements only if the current user has the selected option ticked via a Checkbox List type of Meta Box field.
Field group for Users:
Field being populated on a user profile page:
Applying the condition in Oxygen builder:
With the above applied to say, a Section, the Section will be output only if the current user has "Download rights" ticked in his/her user profile.