Network Management Tool
You don't have to perform many management tasks on a peer-to-peer network. You might check shares or double-check file access on a computer; but for the most part, a peer-to-peer network runs itself.
However, Windows does include a few management tools you may find useful. You can use these tools to see who's sharing which files, who's attached to which computer, and so on.
Learn More:
Understanding Network Management
Using Windows Monitoring Tools
Using Net Watcher
Monitoring the network with Windows XP
Using System Monitor
Understanding Privacy
Monitoring on the Mac
Linux Network Monitoring