use the default smartobject "UMGroup" and its method "Find User Groups" to list all AD groups of the originator and members of the role. Do a comparision of the roles and if they match, send an email

Thanks gor the reply.

I have a small change in the scenario :

Currently I have an activity set up, where in the destination users is set to a Role. But I would want to send email only to members of the Role who belong to the same group(from AD) city as the originator's group city .

Can I use the same strategy that you mentioned ? Also should the comparison be done in a code activity ?

same strategy can be used. Open Smartobject service tester tool and create a smartobject from "Active Directory Service2" You can use "GetUserDetails" method to return all properties of a user from AD. You have to code to compare the fields.I am not sure if this is the best approach.