Springboard icon visibility based on Legal Entity

Summary

How can we restrict springboard icon visibility based on Legal Entity?

Content

Our business operates with a number of Legal Entities that offer different benefits to their employees. We need to include springboard icons on the homepage that are only visible to employees in certain Legal Entities. Does anyone have experience of securing icon visibility in this way?

We know EL expression can be used to restrict visibility by user role, however there is only one employee role used across the entire organization, so we need to restrict by Legal Entity instead.