change visjson filter with slide?

[abenrob]

trying to change the filter of the vizjson witht he slide change, but getting no results - is this intended to be supported?
e.g. I have this in the global config:

-title: "TDF 2015"
-author: "abenrob"
- vizjson: "https://abenrob.cartodb.com/api/v2/viz/27e50b2a-24da-11e5-bdc3-0e853d047bba/viz.json"

if I add

- cartodb_filter: "name='Stage01'"

to the global config, it filters the entire dataset successfully.
However, if I add the filter to the actions for each slide:

TDF - Stage 1

- center: [52.085, 5.152]
- zoom: 14
- cartodb_filter: "name='Stage01'"

there is no change.
Are we able to access the vizlayer in the slide?
Are there data actions?

Thanks!