From my knowledge NAM modules only capture traffic on the machine where they are installed, so there is no way to "pull" traffic from other machines, neither that machines can "push"traffic to NAM (e.g. like with Netflow).
But something can be done with RSPAN. On the remote machine you can configure RSPAN to mirror the traffic to the machine where NAM is installed and then it's possible to capture traffic with NAM.
