User Activity

we have a requirement to get the distribution list of logged in user where  he is in owner and populate the distribution list in select box on form loads, i am not able to figure it out how and where to start ? can any one help me on this? and is it ...
We have an M2M table that is not part of the exempted table (ua_exempted_table_inventory), and I can see it is listed under ua_custom_table_inventory. That means it needs a license. However, as per our requirements, I should delete the old M2M table ...