SAML asignment using group and user data

Hi,

We are using SAML to asign users to groups upon login, using 2 different types of rules:

 - Group based - matching SAML groups to Appian Groups (for example - Director)

 - Rule based - matching user data (taken from SAML properties) to Appian Groups (for example - Office)

We need to be able to create sub-groups using info from Groups + User data (to create a group for - Office Director). We need these groups to be able to assign tasks.

We've tried multiple things but haven't ben able to find a solution to execute this online, and therefore have gone to a batch solution. Is there a way to:

 - create a group from an interesection of 2 groups?

 - create a group using group + user attribute data?

Thanks