Target a user's role via freemarker

You can also use REST v2 for that:

<#function user_has_role (id, roles)>
  <#assign liql = "SELECT id FROM users WHERE roles.name IN (${roles}) and id = '${id}'" />
  <#assign query = rest("2.0","/search?q=" + liql?url) />
  <#if (query.status == "success") && query.data.size gt 0>
  	<#return true>
  <#else>
    <#return false>
  </#if>
</#function>

and call it like this:

<#if user.registered && user_has_role(user.id,"'Administrator', 'Lithium'")>
...
</#if>