Filter all activities except one category of asset

Hello

I was trying to set a filter to exclude all assets which have the string hscid.90 in their asset name.
Trying to do it with substitutions but either am tired or cannot see how to make it
Any hint with cb:if for instance but base on what ? can I write asset= ?

Thanks

There is no functionality to exclude assets. They are always inclusive. Exclude functionality is planned in a later release.

Thanks, looking forward for this feature