I don't believe the MAOI properties of Turmeric are strong enough, even with BioPerine added, to have a significant effect on use of 5-MeO-DMT.
That being said, it would depend greatly on the individual and upon how much curcumin they were taking. Curcumin taken alone would probably not affect the experience much, but with the added BioPerine there is potential for some MAOI action. To err on the side of caution, it would perhaps be best to avoid any turmeric/curcumin supplements 48 hours before the use of 5-MeO-DMT.