identifying the network activity of a process - Mac OS X Lion 10.7.3
Yes, quite a few - ranging from the simple to the more complex. Depends on what you're after in terms of detail, but if you want a nice, easy GUI frontend (that ties up process names with activity) then you could use something like Little Snitch or Hands Off!. They are actually firewalls, which have their own network monitors. So if you find something you don't like, you can always block it.



I also use iStat Menus or iStat Pro (free) which can give you differing view of process and network activity (but not combined like Little Snitch can).

Or for something more detailed you could investigate the terminal netstat command.