Workspace Search Filters -- Adding OR condition

Summary:

We want to create a saved search within Workspace using the filter fields. Only two filters have to be applied, namely 'Owner' and 'Responsible partner' (custom field). For both we use the advanced filter option and the 'Is Me' operator. However, in default the filter is looking at whether the user is Owner AND Responsible partner. Is it possible to add two different filter fields and define it should be an OR requirement?

It already works that way within the same filter group (adding multiple Owner filters creates an OR condition). It is also possible with the Search Box using the | (pipe symbol). But we are looking for adding an OR condition over multiple filter fields.