White listing ip ranges that are able to see the shared tiles from within AlertSite.

We are needing to be able to white list ip ranges that are able to view the shared tiles within AlertSite.  We are wanting to restrict someone outside the company being able to view our synthetic transaction up and down times. as of right now any of our adminisrators has the ability to post a tile to a public dashboard and we are wanting to be to control the audience that is able to view the availability of our systems.