Is there any conditional tag which will allow me to display the certain content only if the user is NOT a subscriber?
An even more simple way, than @Brady showed you is the using
There's also an equivalent for MU installations, named
Behind the curtain
When looking at the source of the functions for single or MU installations, then you'll see, that both basically rely on
Other members of this set
Then there's also
When to use what?
Now, where's the difference between
Is this what you mean?
More details on the ID's for different levels: http://codex.wordpress.org/Roles_and_Capabilities#User_Levels
There is also the current_user_can() function, which lets you denote specific capabilities for more flexibility. http://codex.wordpress.org/Function_Reference/current_user_can