Each route only has one action that handles all forms for that route. To disambiguate the form that was submitted, you have several options. You can use a input with type="hidden" that has a name and value that's unique to the action you want taken, or you can use a name and value on the submit button (note, a single form can also have multiple submit buttons this way). Then, all your action function needs to do is get the intended action from that field value.
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We have a page with invitations to a party. We display who the invitation was sent to along with when the invitation was sent. You can create new invitations and resend or delete existing invitations. So this single route has many forms on the page and each uses a action field to specify the action to take (this is just a convention, the name doesn't matter).