Retrieve Local Admins via Powershell

Hey guys, i'd like a script to run to retrieve the list of local Administrators of a group of servers but only match certain users.

So something like

(Get-WMIObject Win32_Group | Where-Object { $_.Name –eq ‘Administrators’ }).GetRelated() | Where-Object { $_.__CLASS –eq “Win32_UserAccount” –or $_.__CLASS –eq “Win32_Group” } | Select-Object __CLASS,Caption,SID


But have a where-object that includes a certain user (just so we can identify if a user has local admin to any server.

Thanks for your help :)