Query `LastUpdatedBy` group option?

Hello! Is there an option to query an existing user-defined group? For example:

Status = '__Active__'
AND Queue = 'Dispatch'
AND LastUpdatedGroup != 'Dispatch'

Or, another alternative I’m curious about is if there is a placeholder for Requestor, similar to CurrentUser?

AND LastUpdatedBy = '__Requestor__'

Any advice would be much appreciated. Thank you!