For each member, you may specify a severity rule to determine whether a given notification message is sent to this member. If the message's severity satisfies the criterion for the member, it is sent to the member; otherwise it is not. 

To define a severity restriction for the member, set a severity comparison and a UseForSeverity value. For example, to only notify this member for messages with a severity >=8, set UseForSeverityComparison to compGE and UseForSeverity to 8.

Set the value to compUnspecified to not use a severity rule for this group. 

The group, the NotificationGroupMember, and the member itself (e.g., the NotificationIndividual who is the member) all can have severity rules. For a message to be sent to a group member, it must meet the severity criteria for all three.

INotificationAction.Severity,IFileCaptureAction.Severity