BPM rule expert: How to customize condition for AP Invoice having both PO matched and Manual lines

Summary:

Client has a request to create approval rules only for AP Invoices having both PO matched lines and Manual entry lines.

I tried to write condition using simple test:

Invoice Distribution.PO Distribution ID is null and POmatched!='Y'

Or Invoice Distribution.PO Distribution ID is not null and POmatched='Y'

but this can't meet the requirement actually is :

at least there is one line (exists)

Invoice Distribution.PO Distribution ID is null

AND one line (exists)

Invoice Distribution.PO Distribution ID is NOT null

Does anyone know how to write this condition?

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