Forum Main page insert after $ BODY $ code:
Code
<script type="text/javascript">
links=document.getElementsByTagName('a');
for(i=0;i<links.length;i++){
if(links[i].className=='lastPostUserLink'){
user=links[i].innerHTML;
// Administrator and Moderators
if(user=='Name'){links[i].style.color='#FF0000';}
if(user=='Name2'){links[i].style.color='#0000FF';}
// permanent
if(user=='Name3'){links[i].style.color='#00FF00';}
if(user=='Name4'){links[i].style.color='#000';}
// designers and webmasters
if(user=='Name5'){links[i].style.color='#666';}
}}
</script>