JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/2.0.0-beta.1/handlebars.min.js"></script>
<script id="template" type="text/x-template">
<table>
  {{#each privileged_users}}
     <tr><td>{{lookupProp ../users this 'name'}}</td></tr>
  {{/each}}
</table>
</script>

<div id="results"></div>

JavaScript

var data = {
  privileged_users: [ "user1", "user2" ],
  users: {
    user1: { name: "N1" },
    user2: { name: "N2" },
    user3: { name: "N3" }
  }
};

Handlebars.registerHelper('lookupProp', function (obj, key, prop) {
   return obj[key] && obj[key][prop];
});

var template = Handlebars.compile(document.getElementById('template').innerHTML);

document.getElementById('results').innerHTML = template(data);