I'd like to request a feature for the Segments configuration under the Design section.

Currently, when setting up segment criteria based on player attributes, it seems that a player can only be matched if the attribute actually exists on their profile. However, there is no way to define a condition for players who do NOT have a specific attribute (i.e., the attribute is missing / has never been set).

Alternatively, this could also be solved with a segment membership condition — for example, "player is a member of Segment X" or "player is NOT a member of Segment X". With this, I could create a segment of players who have the attribute, and then simply exclude that segment to get the same result as an "attribute does not exist" condition.

So either of the following would cover this use case:

1. An operator like "does not exist" (or "is not set") for player attribute conditions
2. A condition based on segment membership: "is in segment" / "is not in segment"

If there is already a workaround for this, please let me know.

Thank you!