IsMemberOf (group as ObjectIdentifier, user as ObjectIdentifier) as Boolean
|Description:||Returns a TRUE value if the specified user is a member of the selected group or profile. Note that if you have a groups and/or profiles with the same name, a value of TRUE will be returned if the selected user is a member of any one of the matching records.|
|group as ObjectIdentifier(UserGroup, DiscussionGroup)||Represents a specific group or reference to a field that returns a group object|
|user as ObjectIdentifier(User)||Represents a specific user or reference to a field that returns a user object|
|Returned value as Boolean||Returns a boolean value, where "TRUE" indicates that the user specified in the "user" parameter is a member of the group specified in the "group" parameter|
Build a workflow rule that will send an email to a resource once they are assigned to a task, assuming that resource is part of your group.
IsMemberOf('US Marketing', CurrentUser())