At Momentum you can hit everything (mogul course and terrain park), regardless of whether you are signed up in moguls or freeride.
It probably just means you will be assigned to a group with other mogul skiers and have the mogul coaches, but you will still be able to hit the park whenever you want.
Besides, summer moguls on the glacier kick ass, it's so fun and you will probably become waaay better at bumps if you get taught by those guys.