Begin of the insertion**As an** OpenProject user
**I want to** have multi-selectEnd of the insertion Begin of the deletion Related to https://www.openproject.org/topics/280?board\_id=7

Allow

\- “multi user”End of the deletion custom fields Begin of the insertionon users for workpackagesEnd of the insertion Begin of the deletion which allow to pick several users.End of the deletion
Begin of the insertion**so that** I can more easily show and filter that information.

**Acceptance criteria**

- An admin can configure aEnd of the insertion Begin of the deletion \- “group”End of the deletion custom Begin of the insertionfield of type “User”End of the insertion Begin of the deletion fields which allowEnd of the deletion to Begin of the insertionbe multi-select.
- An user can filter the work packages by one user: filter all work packages that have have either User A OR User B.
- An user can filter the work packages by several user: filter all work packages that have User A AND User B.
- On the work package details view multiple users are shown separated by semicolon.
- In the work package table view multiple users are shown separated by semicolon.

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- Only users that are members in that project can be added (current behavior).
- If the multi-select attribute is chosen as an grouping criteria in the work package table view there is one group for each constellations
- User A: only work packages that have user A selected
- User B: only work packages that have user B selected
- User and B: only work packages that have user A and user B selected

**Further information**

- Discussed also in the thread [Group custom fields](https://www.openproject.org/topics/280?board_id=7)

**Screens**

**To be specified**

- UI work package table
- UI filter
- UI work packages details viewEnd of the insertion Begin of the deletion select a group.End of the deletion