Here is an example for putting 3 users up and put it in logged in user list box.
Code:
<a href="http://www.yourwebsite.com/forums/members/user1.html"><span style="color:red;"><b>user1</b></a></span>, <a href="http://www.yourwebsite.com/forums/members/user2.html"><span style="color:green;"><b>user2</b></a></span>, <a href="http://www.yourwebsite.com/forums/members/user3"><span style="color:orange;"><b>user3</b></a></span>