Dear gathinga,
The feature you ask for is available in Groups - Services & Tools section.
Assuming you created this portfolio through the groups section (wazua.co.ke/groups), then what you need to do is ask the group members to go to that section, click on My Group, and then request to join the group you created.
You will then have to confirm their group membership, at which point they can come in and view your watchlist, minutes, etc.
Welcome to Wazua