Ryan --
You cannot do filtering or searching in the Open from Microsoft Office
Project Server dialog in Microsoft Project Professional. In that dialog,
you are limited to grouping by enterprise Project outline codes only. If
you wish to do filtering or searching, I would recommend you use this
functionality in the Project Center page in PWA. Once you locate the
project you wish to open, select its row header and then click the Open
button, which will open the project in Microsoft Project Professional. Hope
this helps.