help with related Items

Hi, i've created an audit form for collecting information from staff. Within this form I've added a related items section (pointing to an actions list) where users can add in an action for that particular audit form. Hopefully that makes sense?

Now, what i need to ensure is when the user goes back in to edit that particular audit form they see only the actions that apply to that form and not just a view of all actions on the related item list.

Any ides?

Thanks

Craig (new to forms designer)