You can look at a computer's Lansweeper webpage under Config\User Info\Users. The report below will also work. Replace "YourComputer" with the name of the computer you would like to report on.
Select tblComputers.Computername, tblComputers.Domain, tblComputers.Computer,
tblUsers.Name
From tblComputers Inner Join
tblUsers On tblComputers.Computername = tblUsers.Computername
Where tblComputers.Computer Like '%YourComputer%'
Order By tblUsers.Name