odoo/addons/project_messages/security/ir.model.access.csv

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
access_project_messages,project.messages,model_project_messages,project.group_project_user,1,1,1,1
access_project_message_project_user,project.project.user,model_project_project,project.group_project_user,1,0,0,0