How to manage multiple relationship?

Hello everyone, 

I have the following strucutre:

DateDim table - Date DATE

PersonActivity Table - ActivityStartDate DATE, ActivityEndDate DATE

I want to filter the report based on the ActivityStartDate and ActivityEndDate, I'm trying to set relation between DataDim and PersonActivity table but only one relation is active at a time.

How can I manage to have filer on multiple filed from One table linked with multiple fields to dimension table.

Thanks,