Sorry for the long reply...
For admins, that would be correct.ACP > Look & Feel > Your Skin > Topic View > post
Find this:
<div class='post_body'>
For Admins only, add this directly below this:
<if test="showacplink:|:$this->memberData['g_access_cp'] AND !$this->settings['security_remove_acp_link']"><div class="post_body_admin">
Then find this:
<if test="repButtonsLike:|: ! $topic['_isArchived']"> {parse template="repButtons" group="global_other" params="$post['author'], array_merge( array( 'primaryId' => $post['post']['pid'], 'domLikeStripId' => 'like_post_' . $post['post']['pid'], 'domCountId' => 'rep_post_' . $post['post']['pid'], 'app' => 'forums', 'type' => 'pid', 'likeFormatted' => $post['post']['like']['formatted'] ), $post['post'] )"} </if>
And add this below:
</div></if>
Result:
If you want it to display for Moderators AND Admins, the <if> statement would be:
<if test="accessreports:|:$this->memberData['is_mod'] OR !empty($this->memberData['access_report_center']) || ($this->memberData['g_access_cp'] AND !$this->settings['security_remove_acp_link'])">
And for just Moderators, I think the <if> statement would be:
<if test="accessreports:|:$this->memberData['is_mod'] OR !empty($this->memberData['access_report_center']) ">
(haven't test, might be wrong.)
If you want it to display it for a certain group, use this:
<php>$groups = array(1, 2, 3, 5);</php>
Then go to ACP > Members > Member Groups.
Look at the left side for the ID number for each group.
and replace them with the ID's for the groups you want.
Then you would use this <if> statement:
<if test="in_array($this->memberData['member_group_id'], $groups)"><div class="your_class_here">
If you need help, PM me and I'll try to help you with getting your results.