Using php's gethostname() function

In situations with load balancers, could we use gethostname() in environment_indicator_check_access($e) (line 488) in order get the server name (opposed to the pathname)?

For example, say you have a production server and a fail-over server behind a load balancer. These servers are joined via mySQL one-way server replication. The URL a user actually has is to the load balancer, not to any particular server. When a content editor is logged in via the load balancer URL, are they editing the primary production server (which will be replicated) or fail over database (which will be 'lost' when you switch back over to primary production).

Thanks for this module.