I'm not sure what you have tried but this is from the default category template.

<!-- Editors -->
<%Links::Utils::load_editors%>
<%if editors%>
<%header_row%><td width="30%">
<%header_font%>EDITORS:<%/header_font%></td>
<td width="70%" bgcolor="white">&nbsp;</td></tr>
<tr><td colspan=2><%body_font%>
<ul><%editors%></ul></font></td></tr>
<%endif%>

The above should show the editors for the category but I'm unsure what it displays.
You may have to call the editors inside of the above.
ie
<%Links::Utils::load_editors%>
<%if editor%>
Editor link
<%endif%>

This is from the help menu:
<%Links::Utils::load_editors%>
<%if editors%>
The following users maintain this category: <%editors%>
<%endif%>

I don't use editors so I'm not that familiar , can you just call the username for the person that is an editor ?
<%if username jeditor or username beditor or username ceditor%>
editor link
<5endif%>

Regards

minesite