The requirements are as follows:
1) To be able to give permissions to usergroups to do the following:
2) For each member of said usergroup to have an interface where they can define keywords
3) To have a process of when a new post is made, IF the keyword is in the post, then trigger an email to be set to the user with,
4) the content of the email being defined in a template, including the link to the post that triggers the email to be sent.
If you are interested in taking on this project, please send examples of other xF mods, as well as how you would approach the keyword triggering. This is a crucial feature that will have to be coded in such a way as to have minimal impact upon the server load.