The ornamental design for a portable lockhousing, as shown and described.
FIG. 1 is a top, right, rear perspective view of a portable lock housing showing our new design;
FIG. 2 is a top, right, rear perspective view thereof, shown in environmental use;
FIG. 3 is a top, right, front perspective view thereof, shown in another environmental use;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a front elevational view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a right side elevational view thereof; and,
FIG. 9 is a left side elevational view thereof.
The broken lines in FIGS. 2 and 3 illustrate environment and form no part of the claimed design. Other broken lines indicate unclaimed portions and form no part of the claimed design.