Hi Arno,
your filter wont work. The "is in" will check whether the whole string on the left is part of the string array on the right.
abc is in (acbde, abc, area)
In the above example only the middle value will be fulfill the condition.
You can work around this with an advanced filter:
dbo.ClearWFElemIdAdv({COLUMN:WFD_AttChoose2#TaskOwners}) = '{N:CURRENTUSER}'
or
dbo.ClearWFElemIdAdv({COLUMN:WFD_AttChoose2#TaskOwners}) like '{N:CURRENTUSER},%'
or
dbo.ClearWFElemIdAdv({COLUMN:WFD_AttChoose2#TaskOwners}) like '%,{N:CURRENTUSER},%'
or
dbo.ClearWFElemIdAdv({COLUMN:WFD_AttChoose2#TaskOwners}) like '%,{N:CURRENTUSER}'
The {COLUMN:* string is the textual representation of the UI value you can see in the attachment. When you click on the show button you can see how the {COLUMN* is replaced.
The bottom part of the attached image shows which workflows are return for my user which is VM Admin.
More details regarding the query can be found here:
https://daniels-notes.de/posts/2021/series-expert-guide-part-4#where-condition-for-a-single-and-multi-value-field
If you still have the choice I would suggest to move to an item list for the employees. In this case you should be able to use a normal filter. In addition you could add meta data like roles, start/end date and so on. But this is only a suggestion and maybe it's already to late. :)
It could also have less of a perfomance impact joining WFElements and WFElementDetails and doing an exact match is probably faster than three likes and an exact match. But this is just a wild guess
Off topic 1:
Thanks for providing a question which I could actually test myself and provide a solution. :)
Off topic 2:
You should edit your post and replace the current attachment with one where the customer is blurred. ;)
Best regards,
Daniel