There may be times when I don't want to get emails on all the messages taking place in a community. For example, I need to follow the APM community to see the any Executive Insight messages. However, out of the 1000 APM messages, there may be 1 for Executive Insight. Likewise for Infrastructure Management, there are a number of subgroups that don't apply to me today. So can I just follow a portion of a community instead of the full community feed?