Below is a GIF of the Multi-user picklist field for your reference:

You can add the above custom fields from the web app (projects.zoho.com) and the same will reflect in the mobile app after carrying out a portal refresh in the mobile app.

Please follow the below mentioned steps to add the Multi-select and Multi-user picklist fields to the layout:

1. Go to web app (projects.zoho.com).
   

2. Setup (at the top right corner).
   

3. Select 'Layouts and Fields', under Portal configuration.
   

4. Select a layout.
   

5. Drag and drop the multi-select and multi-user picklist fields.
   

6. Save the layout.
   

To carry out a portal refresh in the mobile app, go to the Projects mobile app > Go to Settings > Choose Portal > Carry out a 'Pull to refresh' gesture (swipe the screen downwards).

Also, we have covered the below enhancements in this update:

New time options in the Task filters: You can now filter the tasks in the app based on 'Last month', 'Last week' and 'Next 7 Days'.

Tagging Geo-location in Photos: You can also view the location from which the photos are taken if the 'Show location for photos' option is turned on within the Privacy & Security settings of the Projects app.

To turn on 'Show location for photos', follow the steps mentioned below:

1. Go to Projects mobile app.
   

2. Settings.
   

3. Privacy&Security settings.
   

4. Turn on 'Show location for photos'.
   

Also, please ensure that the location services are enabled within the Mobile device's settings.