I have 2 sets or wallets: my personal wallets under mailchain account 1 (personal_accnt) and my work wallet under mailchain account 2 (work_accnt).
I created work_accnt and associated work wallet to it, and shared the account access with the two other ppl that manage the wallet.
Then, to avoid having to log in/out of personal_accnt and work_accnt, I also added the work wallet to personal_accnt.
By doing this, the messages sent to work wallet only show in personal_accnt.
This means that me and my colleges in the work_accnt still see the inbox and its historic messages, but not new messages. My colleges cannot send from the work wallet under work_accnt.