You can issue a command similar to tasklist /svc /fi “imagename eq svchost.exe” where you replace svchost.exe with the running service or task name to see what is linked to it.
This blog entry on Nifty tools for tracking down that “interesting” network traffic may also help you with similar tasks.
SysInternals has great tools for viewing, managing and debugging processes:
Process Explorer – Procmon.exe
Process Monitor – procexp.exe
Process Dump – procdump.exe
Command line PS Tools
MS purchased SysInternals and all the information is now available on TechNet. There are some very good tutorials on diagnosing issues using the tools.
You can also look in the Services Control Panel to see what are a services dependencies.