prohibit same user to approve twice if he is in two different approval group in two different stage

Summary:

I have a case that the payment approval will trigger two level of approval group as below

case 1:

create PPR for multiple invoices with total amount of 50 M.

first question: Can I use the installment amount / document amount / payment amount in the condition

second question: if the invoice / single payment is not exceeding 30M it will go for specific groups if exceeds will go for another level, I have two group A & B

the first level of approval will trigger group B (two persons) with voting option if one approved it, outcome is approved

second level will trigger group A & B and one of them can approve but can't be the same approval in the first level.