$netstats = netstat -p TCP -f
$data = $netstats[4..($netstats.count)] #The good info starts on index 4
foreach($line in $data){
$line = $line -split ' ' | ? {$_ -ne ''}
$final += @(New-Object -TypeName psobject -Property @{'Proto'=$line[0];'LAddress'=$line[1];'FAddress'=$line[2];'State'=$line[3]})
}
$netstat_results = $final
$netstat_results | ? {$_.state -eq 'ESTABLISHED'}
Now it should be easy getting the data you want after parsing the text that netstat returns.