Hi,
Technically speaking, it is possible: you can set statistical indicator for invoices via OF39 or user-exit EXIT_SAPLFMFA_001. However, functionally it does not make much sense. Imagine, that you have created invoices on 200K and your payment budget is only 100K as in your example. What would you do with the rest of unpaid invoices? Pay penalties on them? 
At the end, you would have to pay them all.
Therefore, if your payment budget is only 100K, invoices should not be allowed to trespass this threshold as well. That's how financial circuit should work: try and explain to your client. Of course, some customers might have strange ideas... Well, technical solution I gave you.
Regards,
Eli