User-specific browser session timeout?

$(document).ready(function() {
    Splunk.Session.instance.UI_INACTIVITY_TIMEOUT = 0;
    Splunk.Session.instance.timeoutDelay = 0;

    function overrideStartTimeout() {
        return;
    }
    Splunk.Session.instance.startTimeout = overrideStartTimeout;
    Splunk.Session.instance.stopTimeout();
});

If you really want to do it within another app like search, you can do the same thing, but wrap it in an if statement that checks the username. Getting the username may be non-trivial - usually it shows an auth token but not a name. If you have an AccountBar module, you can get it from there; if not, it may be hiding somewhere in the DOM, but I haven't seen it.

I still think, however, that compartmentalizing into a dedicated app is less risky.

lastKnownUser = 'unknown'

function getUserName() {
    // Only works for pages that have an AccountBar module
    text = jQuery('.accountBarItems').text()
    r = /Logged in as (\S+)/
    matches = r.exec(text)
    if (matches) {
        lastKnownUser = matches[1];
    }
    return lastKnownUser;
}

$(document).ready(function() {
    if ( getUserName() == "dashboard" ) {
        Splunk.Session.instance.UI_INACTIVITY_TIMEOUT = 0;
        Splunk.Session.instance.timeoutDelay = 0;

        function overrideStartTimeout() {
            return;
        }
        Splunk.Session.instance.startTimeout = overrideStartTimeout;
        Splunk.Session.instance.stopTimeout();
    }
});