SET CUTLIST PROPERTY TO BE CONFIGURATION SPECIFIC WITH API

I have a cutlist feature and would like to add a property with a macro, which is easy to do, but I would like the property to be set according to this configuration. I have tried several things but feature.custompropertymanager("") is not working. it looks like we can access configuration specific only with custom properties and not with feature. As soon as I add the config or ("") it failed and I cannot find anything on this! I already tried to activate the configuration (I try with the active and only one) and its always adding as all config.

Any ideas? See the capture!

thanks