Maybe this can help someone:

You can also use jquery:

This would go into the HTML widget:

<span class="offtopic_forbidden">Off-topic is strictly forbidden.</span>
<script>
if (ajaxify.currentPage != 'category/14/staff-recruitment') {
    $('.offtopic_forbidden').hide()
}
</script>

And this would be the container:

<div class="alert ui-draggable-handle alert-danger offtopic_forbidden">{{body}}</div>

Adjust 'category/14/staff-recruitment' to your needs.

• $('.offtopic_forbidden') is a jquery selector, it selects the DOM element with the class .offtopic_forbidden

• The function .hide() hides it.

Additional info:

• You can use another type of container, but be sure to add the class to it.

• You can also rename offtopic_forbidden to your needs.