Sorry, I’m not totally sure what issue you’re talking about. Is this about making a segment for one activity and having it show up for other types? If so, you should also run and ride it to complete the collection! 

Segments are for a particular sport for fairness. Someone cycling up your hill would blow any run or walk attempt out of the water (statistically). Conversely, a user setting a segment for DH mountain bike and applying it to trail run would still be quite unfair. If you were thinking to have a checkbox when creating the segment like: also create for run and ride, then what time is used as the first entry?  

Unfortunately Strava doesn’t support multisport activities yet, and it’s doubtful they’ll implement multisport segments. 

Hi ​@tsehscm , for combining foot sport segments we have an open idea 

 you could vote for.

Segments that are the same for riding and foot sports on the other hand isn’t an idea yet but I guess it wouldn’t be accepted because Strava wants to make sure that a segment is possible, suitable and allowed for a sport and for that is has to be done with that sport as ​@arc88 said.

Thank you, I voted for your idea.

I’m sorry I should have explained better.  I would like to either add a segment to be allowed for more than 1 activity.  Currently Once a segment is added from a Walk Activity it is only allowed to be recorded as a walk.  If I attempt to create a 2nd Activity for the same hill using Ride or Run as the Activity STRAVA will not allow the segment to be created using a different activity..    I would either allow a segment to be recorded using multiple activities or allow the same segment to be saved under multiple activities..  

Thank you, Scott.