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Access custom link type by specific role in RTC work item

One answer

Any role can access any link type.
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@ Ralph can we apply restrictions on link type ? is there any way suppose example only manger role attach any work item using custom link type?

Look into Permissions>Save Work Item>Modify the work item>Modify the work item's links. If you can find the custom link type there, try that. Otherwise you would have to create a custom work item save advisor. See https://rsjazz.wordpress.com/2014/05/26/only-owner-can-close-workitem-advisor/ for an example and pointers to how to get started.

Thanks Ralph ,using above plugin I am getting logged in user but I want to get logged in user role,for that I referred https://jazz.net/forum/questions/199182/how-to-fetch-role-of-a-logged-in-user
but unable to get logged-in user role

Use the search field on my blog and search for role to find examples how to get user roles. There are examples where I calculate the user role(s).