One foreign key referring Multiple column (Notification Concept)

I am new in programming, and I want to ask question regarding database schema (I'm using SQLite Database for Android Development)

I have some table, let say :

1. 
   

   MsMember

   
   

   MemberId

   
   

   Password

   
   


2. 
   

   MsGroup

   
   

   GroupId

   
   

   GroupName

   
   


3. 
   

   MsAnnouncement

   
   

   AnnouncementId

   
   

   AnnouncementName

   
   


4. 
   

   MsComment

   
   

   CommentId

   
   

   CommentContent

   
   


5. 
   

   MsTodolist

   
   

   TodolistId

   
   

   TodolistTitle

   
   

And I want everytime a new row has been inserted to (at least one of) all five tables above, it will create a notification to user, as far as I know, with this concept, I should create a table to store every detail of notification then shows it to user..

And my best opinion so far is I create a table let say MsNotification, then to connect all five tables with this MsNotification I should have foreign key referring to each table..

My Question is would it be possible (and effective) to have a column that has more than one references?

Example :

Foreign key (SourceId) Referring MsMember (MemberId),

Foreign key(SourceId) referring MsComment (CommentId),

Foreign key (SourceId) referring MsAnnouncement (AnnouncementId), and so on.

or is there any better way to implement this concept?

Thank you in advance