This is available for other similar selection options, so it is technically possible. You'd need to add a sequence field to utm.source and then sort using that. I'm sure someone else can explain in detail.

Thanks for your answer Chris.

Indeed one way is to add sequence field, but what I want to achieve is not that.

I believe that currently the values inside the one2many field are ordered by id, what I want to achieve is order them by name asc.

If I would query it, it should be like that: ORDER BY name ASC"