Once you have an HDA with a kinefx rig pose inside, is it possible to store the left arm joints or all the joints as a selection set or “bundle” so you can access the key frames without having to use shift and clicking each joint every time?

I'm also interested in knowing if there is a quick way to group/store/retrieve rigpose joint selections.
For instance, an animator may want to select and focus on a few finger controls at a time (though from a control hda/rigpose python state it seems you can only select one control at a time)

You can create channel groups from an initial joint selection so as to organize/save the corresponding channel selections in the Channel List (shift clicking control joints will append to the the channel list, then Shift+G to create a new group for all those channels), but this seems like it might be a quick way to scope channels for keying without the Animation Editor.