Content Type Segmentation
You can create a template for that specific content type like

node--yourcontenttype.tpl.php


and inside you can check for the user roles like so

// Load the currently logged in user.
global $user;

// Check if the user has the 'editor' role.
if (in_array('editor', $user-&gt;roles)) {
  // print one image
} else {
  //print the other one
}