Filtering the list of Targets for SharePress

mu.php

<?php
add_filter('sharepress_ok_page_names', '__my_sharepress_ok_page_names');
function __my_sharepress_ok_page_names($pages) {
  $current_site = get_current_site();
  if ($current_site->blog_id == 1) {
    return array('OK Page Title for Blog #1');
  } else if ($current_site->blog_id == 2) {
    return array('OK Page Title for Blog #2');
  } else {
    return $pages; // your default might be none, by way of array()
  }
}

role-based.php

<?php
add_filter('sharepress_ok_page_names', '__my_sharepress_ok_page_names');
function __my_sharepress_ok_page_names($pages) {
  // Here, if the current user is an administrator, we allow
  // her to choose from any of the available pages
  if (current_user_can('administrator')) {
    return $pages;  
  // Otherwise, we define a specific list
  } else {
    return array("OK Page Title 1", "OK Page Title 2");
  }
}

simplest.php

<?php
add_filter('sharepress_ok_page_names', '__my_sharepress_ok_page_names');
function __my_sharepress_ok_page_names($pages) {
  // the list should include as many or as few pages as
  // should be available as targets
  return array("OK Page Title 1", "OK Page Title 2");
}