@Adrian Larnaud - Are you referring to @mentioning, like one would do in a Comment?

If so, what would @mentioning yourself help you accomplish?

If you were looking for a way to filter objects/sticky notes, you could Tags.

Perhaps you can tell isore about the problem you are trying to solve.

Or are you referring to adding an Assignee, like you can on Cards?

https://help.miro.com/hc/en-us/articles/360020911193-Cards#h_01F648RQYC68M74BJXYSJX5EGQ

Cards can be assigned to users who have access to the board via email invitation, team share, or project. Cards cannot be assigned to visitors.