Support for multiple roles was added to Access but the wpv-current-user shortcode only recognises the first role, and even if it returned all roles it would be difficult to test that with the normal comparisons available to the wpv-conditional shortcode.
You'll need a custom shortcode for this, I think.
Take the following code which registers a shortcode "roles".
It will return '1' if any of the specified roles apply to the current user.
You would use it like this:
[roles role='author'] // just test if the current user has the 'author' role (amongst others)
[roles role='editor'] // test if they have the editor role
[roles role='author,editor'] // test if they have either the author or the editor role
To then use that in a wpv-conditional shortcode, don't forget to to register the custom shortcode at Toolset > Settings > Front-end Content.