Currently it's not possible to filter an IBPL based on a user field with the value "me", while filtering with a specific user is possible. If you follow these steps:
Create a new field, type user
Assign the field to an already existing element type
Create a new field, type ibpl, support field is the element you used in step 2
add a new filter to the ibpl, fields -> the name of the field you created in step 1 -> value "- me -"
Save the field
Integrity fails with this error message:
"ibpl-Supportfilter must not use the symbolic user "me", because it's evaluated without user context".
This doesn't seem to be a very good restriction, as filtering based on a user field can be essential in some IBPL fields (e.g. if you want to assign a group of users to an element and constrain an IBPL backed by this element, so that only the users assigned to it can use it), and as far as I understand the IBPL field, it's always evaluated dynamically and in a context of a user. So it would be great, if Integrity would support filtering by the symbolic user "me".