Show only related records with assigned accounts

Hey there,

Best regard,

I write to see if anyone can help me on this …

I need a user to see all the history related to their assigned accounts, but can not view the history of other accounts …

For example…

A user “A” indicating “Account 1”, a user “B” which is what makes the calls for all accounts, make a call to the “Account 1” and registered …

What I wish is that the user “A” to see the details of all calls made by the user “B” related to their accounts, but can not see the other calls made by the user “B” related to other accounts …

How I can do this?

Thank you in advance for your help.

Regards.

Please… Any help…