How to do it...

1. Define the user who is to be given access to this printer and get the group's security principal details:

      $GroupName = 'Sales Group'
      $Group = New-Object -Typename 
                           Security.Principal.NTAccount `
                          -Argumentlist $GroupName

1. Next, get the group's SID:

       $GroupSid = $Group.Translate([Security.Principal.
                              Securityidentifier]).Value

1. Now define the SDDL that gives this user access to the printer:

    $SDDL = 'O:BAG:DUD:PAI(A;OICI;FA;;;DA)' +
            '(A;OICI;0x3D8F8;;;$GroupSid)'
  

1. Display the details:

      'Group Name : {0}' -f $GroupName
      'Group SID : {0}'  -f $GroupSid
      'SDDL : {0}'       -f $SDDL

1. Get the Sales Group printer object:

      $SGPrinter = Get-Printer -Name SGCP1

1. Set the Permissions:

      $SGPrinter | Set-Printer -Permission $SDDL