dashboard display user timeout override

We have several ( hundreds of ) dashboards which show pertinent data to the relevant teams here.

Each set of teams sit in separate areas, and they all need to see their dashboards.

As such, we have set up dashboard stations ( computers with a bunch of screens attached ) so they can put all their dashboards in their own areas on a specific wall etc..

The only portal which is timing out is the LogicMonitor portal.

Is there any way to override a specific account to not be bound by the portal settings for idle logons?

We need to keep our. timeout settings as 4 hrs for all other users, but these specific screens need to remain forever not being logged out ( as much as is possible ) 

Is it possible to have a per-account override for “user session timeout” ?