Primary computer user by department

hello everyone,

I am working on a filter to list primary computer user by department. I copied bsakata's sql script (thank you bsakata)

select a1._ResourceGuid, i.name from
(select name, domain from dbo.vuser where department like '%IT%') aduser
JOIN dbo.Inv_AeX_AC_Primary_User a1 on aduser.name = a1.[user]
JOIN dbo.vitem i on a1._ResourceGuid = i.guid
WHERE a1.[Month] = datename(month,dateadd(mm,0,getdate()))

the link:

https://www-secure.symantec.com/connect/forums/how-can-i-target-computers-where-primary-user-specific-department.

I would like to also add the user manager in the where clause (to filter by department and manager). But in the vUser table I noticed that there is no "manager" column. In which table or view is this information kept? Also would someone point me towards documentation/videos on how to create a filter/a report using the report/filter generator?

thank you all in advance

regards