You can use these files or simply compile from source.

From: Dave Lopata <Lopata@Apple.Com>
Subject: 2.7.6-4 For OS X
Date: Fri, 12 Dec 2003 00:18:30 -0500

...

	Attached is the latest package.  Please note that this package include 
both a 10.2 and 10.3 version of DansGuardian.  During the Install, it 
checks the OS version, and Does The Right Thing.

Dave/SE


More info here:

http://www.lopata.net/staticpages/index.php?page=DGCHome