This is the query to create the report for Machines with Altiris Agent Installed along with their IP addresses.
SELECT vc.[Name], vc.Domain, vc.[IP Address], vc.[OS Name], vc.[isManaged], vc.[Guid] FROM vComputer vc WHERE vc.[Guid] IN ( SELECT DISTINCT agent.[_ResourceGuid] FROM Inv_AeX_AC_Client_Agent agent WHERE agent.[Agent Name]='Altiris Agent' OR agent.[Agent Name]='Altiris eXpress NS Client' ) AND ( LOWER(vc.[OS Name]) LIKE '%windows 2000%' OR LOWER(vc.[OS Name]) LIKE '%server 2003%' OR LOWER(vc.[OS Name]) LIKE '%2008%' OR LOWER(vc.[OS Name]) LIKE '%vista%' OR LOWER(vc.[OS Name]) LIKE '%windows xp%' OR LOWER(vc.[OS Name]) LIKE '%windows%' ) AND LOWER(vc.[System Type]) like '%win%' AND vc.[IsLocal] = 1 order by [IP Address]