Summary: Learn to use Windows PowerShell Out-GridView to filter NetStat output.
How can I use NetStat to check TCP port connections, and additionally have a graphical tool to filter the output?
Use the NetStat command inside Windows PowerShell, and pipe the results to the Out-GridView cmdlet. Then use the Filter parameter to filter the output:
netstat -a | Out-GridView
The Out-GridView control is shown here.