I have seen dozens of N. macrophylla seedlings over the years from both seed and tc and I don't recall a single one ever having striped peristome. So I would rule that out completely. I also don't recall the ?? 'N. macrophylla' from Germany having them either. I don't think it's that plant.
To me it looks very N. lowii like in the pitcher, markings and leaf shape. Is the pitcher recently opened? It looks like a newly opened seedling N. lowii pitcher to me. They take a while to color up.. Could it be some sort of N. trusmadiensis? yes but odds are it's a N. lowii that was mistakenly mislabelled somewhere along the way. Time will tell!