Something

        <p tal:condition="python:proj['security']=='open_policy'">
          Currently anyone can view the content of your project and 
	  contribute to it.
        </p>
        <p tal:condition="python:proj['security']=='medium_policy'">
          Currently anyone can view the content of your project.  Only project
	  members can contribute content.
        </p>
        <p tal:condition="python:proj['security']=='closed_policy'">
          Currently only your project members can view the content
          of your project and contribute to it.
        </p>