Então, eu acho que você quer isso:
gci | %{$path = $_.fullname; $_} | get-acl | %{$_.access | select FileSystemRights, Identityreference, @{N="Path";E={$path}}}
Isso listará todas as permissões para todos os subdiretórios da pasta em que você está atualmente. Parece com isto:
FileSystemRights IdentityReference Path
---------------- ----------------- ----
FullControl NT SERVICE\TrustedInstaller C:\Windows\$Reconfig$
268435456 NT SERVICE\TrustedInstaller C:\Windows\$Reconfig$
FullControl NT AUTHORITY\SYSTEM C:\Windows\$Reconfig$
268435456 NT AUTHORITY\SYSTEM C:\Windows\$Reconfig$
FullControl BUILTIN\Administrators C:\Windows\$Reconfig$
268435456 BUILTIN\Administrators C:\Windows\$Reconfig$
ReadAndExecute, Synchronize BUILTIN\Users C:\Windows\$Reconfig$
-1610612736 BUILTIN\Users C:\Windows\$Reconfig$
268435456 CREATOR OWNER C:\Windows\$Reconfig$
268435456 CREATOR OWNER C:\Windows\ADAM
268435456 NT AUTHORITY\SYSTEM C:\Windows\ADAM
Modify, Synchronize NT AUTHORITY\SYSTEM C:\Windows\ADAM
268435456 BUILTIN\Administrators C:\Windows\ADAM
Modify, Synchronize BUILTIN\Administrators C:\Windows\ADAM
-1610612736 BUILTIN\Users C:\Windows\ADAM
ReadAndExecute, Synchronize BUILTIN\Users C:\Windows\ADAM
268435456 NT SERVICE\TrustedInstaller C:\Windows\ADAM
FullControl NT SERVICE\TrustedInstaller C:\Windows\ADAM
268435456 CREATOR OWNER C:\Windows\addins
268435456 NT AUTHORITY\SYSTEM C:\Windows\addins
Modify, Synchronize NT AUTHORITY\SYSTEM C:\Windows\addins
268435456 BUILTIN\Administrators C:\Windows\addins
Modify, Synchronize BUILTIN\Administrators C:\Windows\addins
-1610612736 BUILTIN\Users C:\Windows\addins
ReadAndExecute, Synchronize BUILTIN\Users C:\Windows\addins
268435456 NT SERVICE\TrustedInstaller C:\Windows\addins
FullControl NT SERVICE\TrustedInstaller C:\Windows\addins
FullControl NT SERVICE\TrustedInstaller C:\Windows\AppCompat
268435456 NT SERVICE\TrustedInstaller C:\Windows\AppCompat
FullControl NT AUTHORITY\SYSTEM C:\Windows\AppCompat
268435456 NT AUTHORITY\SYSTEM C:\Windows\AppCompat
FullControl BUILTIN\Administrators C:\Windows\AppCompat
268435456 BUILTIN\Administrators C:\Windows\AppCompat
ReadAndExecute, Synchronize BUILTIN\Users C:\Windows\AppCompat
-1610612736 BUILTIN\Users C:\Windows\AppCompat
268435456 CREATOR OWNER ....
Se eu entendi mal sua pergunta, diga.