The ornamental design for a portableprivacyunit, as shown and described.
FIG. 1 is perspective view from above of the portable privacy unit of my new design.
FIG. 2 is an elevational view of the front of the privacy unit of my new design.
FIG. 3 is a right side elevational view of the privacy unit of my new design. The left side elevational view is a mirror image of the right side.
FIG. 4 is an elevational view of the back of the privacy unit of my new design.
FIG. 5 is a bottom plan view of the privacy unit of my new design; and,
FIG. 6 is a top plan view of the privacy unit of my new design.
The broken line showing of details in FIGS. 1 is included for the purpose of showing environmental portions of the portable privacy unit and forms no part of the claimed design.