@bea

In a task tracker, Assignee is usually the person currently responsible for doing the work, while Owner is the person ultimately accountable for the task or outcome.

For example:

Role	Meaning	Typical question
Owner	Accountable for the task/result	“Who makes sure this gets done?”
Assignee	Expected to perform the current work	“Who needs to act on this now?”

A task might be:

Implement sharing permissions

Owner: Eric

Assignee: Alex

Eric owns the outcome, coordinates decisions, and follows it through to completion. Alex is currently implementing it.

The distinction becomes especially useful when work moves between people. For example:

Design → Engineering → Review

The Owner can remain Bea throughout, while the Assignee changes from Bea → Eric → Gabo depending on whose turn it is.

If your tracker is simple and tasks normally have one person responsible from beginning to end, I would only use “Assignee.” Adding Owner creates unnecessary ambiguity.

For Seed's Boards/task model, I'd probably define:

Owner: the person accountable for the task reaching its intended outcome.
Assignee: the person currently expected to take the next action.

That also fits nicely with a workflow-oriented Board because assignee is dynamic; ownership is persistent.