Assign task array user

I have a use case where I need to apply visibility rules to requests generated in an application. In other words, if I create a request, only users from my department should be able to see it. In the client’s system, there are many departments, and creating a group for each of them doesn’t seem like the right solution. Additionally, new departments may emerge in the future. As a solution, I’m considering detecting the department code of the user initiating the process (this value is stored in the custom field ‘customfield1’). Then, when applying visibility rules to requests, I would calculate all users who have the same value in ‘customfield1’ as the user who created the request. My question is: Is there any issue in Appian if I assign tasks to an array of users instead of Appian groups?