When rendering forms for logged-in private portal users, instead of hiding name and email, display it but pre-fill it.

1-Old.html

{% if current_user == nil or current_user.is_guest %}
<div class="input"><span class="form_label">{{system.snippets.your_name}}:</span>

{{ interaction_name }}

</div>

<div class="input">

<span class="form_label">{{system.snippets.your_email}}: <span class="form_label_required">({{system.snippets.optional}})</span></span>

{{ interaction_email }}

</div>
{% endif %}

2-New.html

<div class="input">
  <span class="form_label">Your name:</span>
  <input class="default l" id="interaction_name" maxlength="100" name="interaction[name]" size="100" type="text" value="{{current_user.customer.name}}">
</div>

<div class="input">
  <span class="form_label">Your email address: <span class="form_label_required">(Optional)</span></span>
  <input class="default l" id="interaction_email" maxlength="100" name="interaction[email]" size="100" type="text" value="{{current_user.customer.email}}">
</div>