Checked with a few ppl:
I assume question is if we can add sling:redirect property on a dam:Asset node.
Theoretically there shouldn't be issue since sling: redirect is for nodes.
But in context of dam assets I cannot think of valid usecase. However click on an image can be definitely redirected to other page or asset.
I've tried adding a sling:redirect property to a damAsset and the redirect does not work.
Our users would like to be able to add a redirect rather than updating the 100s of places within the content that is referencing the asset.