As suggested by Pascal Rapicault on user list, allow filtering of examples scenarios by adding a column for the meta info:
For each example scenario, i.e. for each row of the Examples table, the meta specified will be matched against the meta filter provided and if allowed the scenario will be run.
NOTE: the meta filter provider is unique for the run, so the meta info must be able to match both the scenario or story. In the example above, the Meta @run is specified to allow it be matched by any value of the meta filter that specifies a @run value.
If specifying meta filter '+run yes' only the first example will be run, while specifying '+run not' only the second will be run.