workflow to send notification email to different group people

I am using SharePoint designer 2010. I have a document library created with content type. when a member is trying to create an item notifications is sent to the members belonging to that item. But my concern is I am having more than 100 groups and needs to check if the person creating the item belongs to any of those groups and send the email to him. How to check is he is any of those 100 groups . what would be the condition or action i can use simply to check if he belongs to any of those 100 groups. And also is there any alternate other than workflow to do this.