You know that at the top of each thread in the IPF App, there is a bar with the thread title and an arrow pointing right?
Click on this bar and it will take you to the website version of the page where you can then hold on links and copy them. You can navigate to wherever you need to to get the link then simply get back into the IPF App thread and paste...
It's not the best, but it works without leaving the iPF App...
Hope that tip helps...