Local Network Monitor API is a high performance application-level network.
Editor: Local Network Monitor API is a high performance application-level network requests filtering framework for Windows NT/2000/XP/2003/Vista, that lets you control IP-family protocols activity on your local system in a real-time. API works at the Transport Driver Interface (TDI) level of networking operations in the operating system kernel and allows to view and control (block) application-level network activity.
Local Network Monitor API is available for developing application-level network sniffers, traffic analyzers, traffic, meters, application network troubleshooting tools, firewalls, etc.
Feature
Monitor and control an application-level TCP/IP activity in a real-time.
localhost (127.XXX.XXX.XXX) network activity monitoring (not available in the majority of network sniffers available on the market).
Obtain detailed statistics on the amount of data sent and received over a connection.
Filter the data captured so that you only see packets that were send or received with particular protocol, from particular local ports range, to remote addresses and ports range.
Block network requests for the selected processes (desktop firewall) you can free download Local Network Monitor API 2.2 now.