Can you define different default Subscriptions for different Work Item types ?

Customer has several Work Item types that they use.
But I do not see where I can have 2 versions of subscriptions where one would reference Default value X and the other would reference Default value Y.
Is there something I need to do in order to accomplish this ?
- They would like to have default Subscription X for Work Item type A set to contain the ids of persons J, K and L.
- They would also like to have a different default Subscription Y for Work Item type B so that it contains the ids of persons J, L, M and N.
But I do not see where I can have 2 versions of subscriptions where one would reference Default value X and the other would reference Default value Y.
Is there something I need to do in order to accomplish this ?
2 answers

as Ralph mentions you cannot do it with attribute customization, but could with a java extension.
I wrote one for a customer a couple years ago.
Comments

Sam, since there is only one subscription collection, and subscriptions do not allow to carry any additional information, how did you stre the additional information required for different types of subscriptions?

this is a participant plugin
You create a xml properties data model to hold the extra info for an aspect editor. its not as nice as it could be cause U have to edit the process spec to update it, but better than nothing.