When you click Bind you cannot select another mesh, you can only click bones.
If you mean that when using the Weights tool and you have a mesh selected, you don't want to be able to select another mesh, then no, we don't have plans to change that. All the tools in Spine work this way, allowing you to select another item.
Rather than suggesting a fix to a problem you are having, it is often more productive to explain the actual problem you are having. What exactly are you doing when you get unwanted selection of another mesh?
Note if you select a mesh and also at least one vertex with the Weights tool, then other meshes cannot be selected. This sounds similar to what you are proposing. You can hold ctrl (cmd on Mac) and box select other vertices.
Unlike most programs, in Spine you don't have to drag on small handles. In general you make your selection, then you can drag anywhere to adjust it. This reduces the fine motor skills needed and therefore reduces wrist and repetitive strain. That said, if you do drag on something (like a mesh vertex with the Weights tool or a bone with the Rotate or other transform tool), then it will both select it (like a click would) and also start a drag to modify it.
