How to find contacts using a field that belongs to accounts?

I want to make a filter for contacts using a field belonging to accounts.

But that is not possible in Zoho.

For example, I have created in accounts a personalized field called 'Important account' (Y/N).

And I want to create a filter (for emailing, for example), that looks for "contacts whose accounts are important".

Anyone has an idea or workaround of how to do it?