finally i got the output...
SELECT l.LeadBudget, l.CompanyName, l.LeadTitle, l.Status, leadEmp.Name As OwnerName, createdEmp.Name As CreatedUser
FROM Leads l
INNER JOIN Employee leadEmp ON(l.LeadOwner = leadEmp.EmployeeId)
INNER JOIN Employee createdEmp ON(l.CreatedUserId= createdEmp.EmployeeId)
WHERE l.LeadId='2'