C:\Documents and Settings\myself>wmic path win32_groupuser where (groupcomponent="win32_group.name=\"justanothergroup\",domain=\"%computername%\"")
GroupComponent                            PartComponent
win32_group.domain="XP191",name="justanothergroup"  \\XP191\root\cimv2:Win32_UserAccount.Domain="XP191",Name="JustAnotherUser" 
win32_group.domain="XP191",name="justanothergroup"  \\XP191\root\cimv2:Win32_UserAccount.Domain="XP191",Name="sjones"             
win32_group.domain="XP191",name="justanothergroup"  \\XP191\root\cimv2:Win32_UserAccount.Domain="XP191",Name="gsmith"
win32_group.domain="XP191",name="justanothergroup"  \\XP191\root\cimv2:Win32_Group.Domain="TEST",Name="Domain Admins"