I don't know if this is doable today. I'm marking this for Chris the PM to look at and get back to you.
Thanks..that post did provide a mechanism for me to do what I need. It's not the cleanest/pretty way to get the data but it will work for now.
It would still be nice to potentially see an cleaner view builder within Netflow that has drop downs like for Time or Flow direction but on the individual charts.
For example I could build a page of 4 or more generic empty chart resources and each user can use the drop downs per chart to get their own quick custom view of whatever 4 interfaces and resources (application/endpoint/etc) they want to see.
Until that beautiful day I can use the custom html resource and have static pages.