The best way to achieve this is via the layout editor (see
https://www.jevents.net/frequently-asked-questions/event-detail-layout-editing) and using conditional output.
e.g. if your condition field is called show_text_field (with values 1,2,3 or 4) then you could include something like this in your layout
<div class="hiddentext text1_{{show text field:show_text_field}}">Text 1</div>
<div class="hiddentext text2_{{show text field:show_text_field}}">Text 2</div>
<div class="hiddentext text3_{{show text field:show_text_field}}">Text 3</div>
<div class="hiddentext text4_{{show text field:show_text_field}}">Text 4</div>
couple this with some custom CSS
.hiddentext {
display:none;
}
.hiddentext.text1_1, .hiddentext.text2_2, .hiddentext.text3_3 , .hiddentext.text4_4 {
display:block;
}