[Xenon]

hmm like this way:

PHP Code:

if ($post[usergroupid]==6) { 
$post[username]="<font color=red>".$post[username]."</font>"; 
} 
if ($post[usergroupid]==5 || $post[usergroupid]==7) { 
$post[username]="<font color=blue>".$post[username]."</font>"; 
} 
if ($post[usergroupid]==9) { 
$post[username]="<font color=gray>".$post[username]."</font>"; 
} 


and so on for all of your usergroups you want to change the color.
just directly below if($post[userid]!=0) {
...