& net session | ? { $_ -match '^(\S+)\s+(\w+)\s+(.*)\s+(\d+)\s+(\S+)\s*$' } | % {
  New-Object -Type PSObject -Property @{
    'Client' = $matches[1]
    'User'   = $matches[2]
    'Type'   = $matches[3].Trim()
    'Open'   = $matches[4]
    'Idle'   = $matches[5]
  }
}

& net file | ? { $_ -match '^(\d+)\s+(.*)\s+(\w+)\s+(\d+)\s*$' } | % {
  New-Object -Type PSObject -Property @{
    'ID'    = $matches[1]
    'File'  = $matches[2].Trim()
    'User'  = $matches[3]
    'Locks' = $matches[4]
  }
}

#http://stackoverflow.com/questions/29209972/monitor-shared-file-access-using-powershell