the access rule used in the domain model should allow of to go to the current user if an assocation is linked to the entity :
something like :
[.../…./….='[%CurrentUser%]']
maybe this also can help :
https://forum.mendix.com/link/questions/86403
maybe you can also use the token currentobject that can allow you to retrieve the parent object of the datagrid (you can put a dataview account and below that the datagrid)
The link you provided has exactly what I was looking for, thank you!