Hi, I think you have 2 options
Removing the field from your global list\form views and then add to the views from within the MSP domain IE where you need the visibility. This should create domain specific views, the down side to this would be having 2 sets of views to maintain and users may still be able to access the fields via reporting etc.
I think a better option would be to look at ACL's based on domain, as the field will not be accessible if the user has no rights to see it.
A couple of OOB examples as a possible guide, from a domain separated PDI
/sys_security_acl_list.do?sysparm_query=scriptLIKEgetDomain&sysparm_view=
