For setting the filter, we need to be able to add, for e.g. filter_nearest in the sampler2D’s declaration like this:
uniform sampler2D tex_frg_2: filter_nearest. But there is no way of doing that through visual shader, so the answer is NO, you can’t set the filter for Texture2D node from visual shader itself, its necessary to use the Tex2D’s sampler2D port for that