I'm currently working on a NetSuite integration project, and in one of the Suitelets, I need to get the remote IP address of the user or client.
An easy way to get the value is via the request headers. For example:
var ip = context.request.headers['ns-client-ip'];
There are several other interesting and potentially useful headers that are available, including the the user-agent (ex: "Mozilla/5.0"), the NetSuite host (ex: "startron11.extforms.netsuite.com"), and so on. To get a sense of what's available, log the headers, like this...
log.debug( { title: 'Headers', details: context.request.headers } );
Then review the script's Execution Log.