これは、ACLとACEを使用したネイティブな方法の例です。その周りに独自の関数を作成する必要があります。
# Get the Access Control List from the file
# Be careful $acl is more a security descriptor with more information than ACL
$acl = Get-Acl "c:\temp\test.txt"
# Show here how to refer to useful enumerate values (see MSDN)
$Right = [System.Security.AccessControl.FileSystemRights]::FullControl
$Control = [System.Security.AccessControl.AccessControlType]::Allow
# Build the Access Control Entry ACE
# Be careful you need to replace "everybody" by the user or group you want to add rights to
$ace = New-Object System.Security.AccessControl.FileSystemAccessRule ("everybody", $Right, $Control)
# Add ACE to ACL
$acl.AddAccessRule($ace)
# Put ACL to the file
Set-Acl "c:\temp\test.txt" $acl
(Get-Acl "c:\temp\test.txt").access
Read-Host "--------- Test Here --------------"
# Remove ACE from ACL
$acl.RemoveAccessRule($ace)
Set-Acl "c:\temp\test.txt" $acl
(Get-Acl "c:\temp\test.txt").access