It appears that I cannot use a beast mode calculation as a filter. Every time I try to drag and drop the the field over the filter area it simply won't allow me.
A beastmode calculation can be used as a filter, just not if it uses an aggregate function, such as SUM, AVG, MAX, etc. The reason for that is that filtering has to happen before aggregation. Filtering is meant to remove unwanted records so that calculations (aggregations) and visualizations don't include values you don't want to see. If a beastmode contains an aggregate function, it is processed AFTER the filtering has been completed.
Does that help clear up what's happening?
@mmalpass, did zcameron's reply help you out?
This is incredibly limiting. Is there a way around this or plans to allow post-aggregation filtering?
There are tons of legitimate use cases to filter on aggregations (e.g. filtering a sum minus another sum). Tableau can do this, why not Domo?