Can I use stripe if apple IAP doesn't support my business rule?

We are currently working on a APP where every user can create multiple institutions and every institution has a monthly or yearly price, but this mean that every user can have multiple subscriptions within the same group! We didn't find a way to do it using renewable IAP subscriptions, in this case, does Apple allow us to use third parties as Stripe?

No.

Can I use stripe if apple IAP doesn't support my business rule?
 
 
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